DGRVP- The CIA's Secret Deal With Steve Jobs (Page 9 of 60)
Pretty good discussion around several things in World War 2. The War in the Pacific: How WWII Changed the World Forever - Dr Robert Lyman 00:00 Trailer 00:35 Overview of the Pacific War 05:38 Japanese racial superiority 08:28 The Samurai and military identity 10:30 Japan tried to create an empire by force 13:17 America joins the war 15:45 The oil embargo 18:09 Japan’s military campaigns were NOT driven by economic interests 20:19 The Emperor wasn’t in charge 23:44 SPONSOR: Monetary Metals 24:33 America bludgeoned Japan in the island campaign 27:10 Australia’s amazing campaign 28:05 Japan switched on America’s lightbulb 29:46 Britain failed to imagine the possibility of war 32:58 “Objective Burma!” 36:30 Why India produced the biggest volunteer army of all time 40:57 Japan wasn’t prepared for the British Empire to rise up 43:56 It was a genuine crusade against evil 45:26 The ethics of dropping the bomb 46:41 SPONSOR: Mint Mobile 47:56 The Allies had to bring Japan to its knees to ultimately save more lives 52:24 Israel/Gaza 54:45 Why America dropped the second bomb 56:35 The shocking Bushido code 59:05 The modern West cannot conceive of this worldview 1:01:25 This is what Putin is up to 1:04:05 There’s an easy way to end the Russia/Ukraine war 1:08:11 Robert’s books |
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Originally Posted By DaGoose: Pretty good discussion around several things in World War 2.  https://www.youtube.com/watch?v=WsyQDp9ALLY00:00 Trailer 00:35 Overview of the Pacific War 05:38 Japanese racial superiority 08:28 The Samurai and military identity 10:30 Japan tried to create an empire by force 13:17 America joins the war 15:45 The oil embargo 18:09 Japan’s military campaigns were NOT driven by economic interests 20:19 The Emperor wasn’t in charge 23:44 SPONSOR: Monetary Metals 24:33 America bludgeoned Japan in the island campaign 27:10 Australia’s amazing campaign 28:05 Japan switched on America’s lightbulb 29:46 Britain failed to imagine the possibility of war 32:58 “Objective Burma!” 36:30 Why India produced the biggest volunteer army of all time 40:57 Japan wasn’t prepared for the British Empire to rise up 43:56 It was a genuine crusade against evil 45:26 The ethics of dropping the bomb 46:41 SPONSOR: Mint Mobile 47:56 The Allies had to bring Japan to its knees to ultimately save more lives 52:24 Israel/Gaza 54:45 Why America dropped the second bomb 56:35 The shocking Bushido code 59:05 The modern West cannot conceive of this worldview 1:01:25 This is what Putin is up to 1:04:05 There’s an easy way to end the Russia/Ukraine war 1:08:11 Robert’s books Glancing at the title I saw "The Forever War", a great book.  |
The person who complains most, and is the most critical of others has the most to hide.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
Covered pretty much the same stuff as his channel and other talks have covered. Michael Shellenberger: How Our Leaders Lost All Credibility Outline: [0:00] History, anthropology, and predicting the future [9:48] Historical precedents for our current crisis [21:10] The possible triggers of a 2nd American Civil War [28:49] Plausible deniability and risk mitigation [35:41] Hyperbole is necessary to convey psychological reality [43:07] America has lost its moral backbone [48:32] Has DEI hiring ruined the job market? [54:26] Is this the “prosperity” we were promised? [1:00:41] Mating, dating, and meaning [1:10:12] Our culture panders to women and disempowers men [1:22:59] Is everything really that broken? [1:35:24] We’ve lost our moral boundaries [1:41:33] Communism, fascism, and liberalism [1:47:53] We’ve forgotten how to counter extreme voices [1:55:55] Why should anyone listen to you, Rudyard? [2:00:21] Boomer bureaucracies broke the American soul [2:04:23] How individuals can thrive in a broken society |
Interesting spin on it. Is Bureaucracy Killing Civilization? |
Well worth the watch. Election 2024 - Why Trump Won | Victor Davis Hanson 00:00 Introduction 01:24 Why the electoral map turned red 05:37 Trump victory is a win for democracy 08:46 The decisiveness of Trump's victory 12:35 Can Trump heal America? 15:47 Disconnect between the population and the elites 19:33 The possibility of election fraud 22:18 Will the United States settle down now? 25:52 Media bias and election coverage 29:59 Bilateral relationships and Trump's vindictiveness 32:40 Trump will be more experienced now 39:40 Trump's approach to the Middle-eastern conflict 43:14 Trump's approach to the Russo-Ukrainian conflict 50:20 Trump's presidency unwelcome in Beijing 56:14 A reset of environmental policy under Trump 59:52 The worrying state of the US budget 1:03:47 Tariffs and trade under Trump 1:09:53 Geopolitical awareness in Australia |
Pretty good talk about history. The Three Historians: Niall Ferguson, Victor Davis Hanson, and Andrew Roberts | Uncommon Knowledge Niall Ferguson, Victor Davis Hanson, and Andrew Roberts are senior fellows at the Hoover Institution and among the most prestigious and popular historians in the world. This is the first time they have appeared together in a public forum. Among the topics they cover in this wide-ranging discussion: the recent controversy regarding Winston Churchill’s role in World War II, the false premise of the 1619 Project, the Cold War, World War II, and the role of historians in public life. In addition, they critique recent trends in historical writing and the recent phenomenon in much historical research of self-loathing in Western historical narratives, arguing that these views often distort factual history. The scholars also argue for history’s essential role in democracy and for learning from past mistakes. Ultimately, they conclude with reflections on contemporary global challenges, contrasting the open societies of the West with authoritarian regimes and expressing cautious optimism about the resilience of democratic values. |
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Interesting short video on Bronze Age ships in Northern Europe. He made a point of saying that the Scandinavian buildings weren't made of stone and so were lost, but don't think he takes into account the climate and wood being a decent insulator over stone.  Enormous Nordic Bronze Age Sailing Ships 00:00 Nordic Bronze Age Sailing Ships 04:09 Prehistoric Boat Technology 05:06 The Oldest Boat in the World 06:52 Nordic Bronze Age Trade Routes 08:11 The Hjortspring boat 09:30 Rock Art Boats 11:23 Calculating Crew and Boat Lengths 12:08 Stone Ships or Ship Settings 13:07 Evidence for Masts and Sails 14:36 No Transatlantic Journeys 15:42 Decline in Sail Use? 16:22 Scepticism 17:29 Mediterranean Sailing Ships |
Good video on the Catacomb culture. Wagon Drivers of the Bronze Age Steppe: The Catacomb Culture 00:00 The Catacomb culture 04:18 The Yamnaya culture 07:40 Catacomb Origins 10:28 Catacomb Burial Custom 12:55 The First Wagons and Chariots 17:50 Catacomb Settlements 18:52 Population and Climate Change 20:50 Mycenaean Ancestors 22:52 Death Masks and Skull Binding 25:27 The Late Bronze Age Steppe 29:30 Indo-European Lineages and Branches 31:55 What Happened to the Catacomb Culture? |
Interesting..... The Strange Truth About Phallic Imagery in the Nordic Bronze Age (History Documentary) 00:00 Nordic Bronze Age Rock Art 04:30 Please Support the Channel 05:05 Bronze Age Petroglyphs 07:05 Bronze Age Ships 07:47 Ritual vs Reality 09:00 Phallic Imagery 10:56 Weapons and Warfare 12:37 Clothing and Armor 15:28 Male Physiology 17:28 Polynesian Warriors |
Another interesting one. The Beautiful Women of Bronze Age Europe 00:00 Ancient Beauty 01:49 Video Partnership 02:54 Interpreting Burials 04:10 Nordic Bronze Age Clothing 04:40 Unetice culture jewellery 05:14 Tumulus culture female identity 06:43 Urnfield culture burial practices 08:10 Ancient Aegean female figurines 09:37 Minoan Snake Goddess figurines 10:46 Women on the Akrotiri frescoes 12:33 Women and Aegean mirrors 15:28 Women in Mycenaean art 17:53 Mycenaean plaster face goddess 19:52 The female aesthetic ideal 20:14 The idealised female role |
Interesting video on Jupiter and outer planets effects on comets. Simulating Jupiter's comet shield 00:00 Shoemaker-Levy 9 02:50 Oterma 04:38 Space gateways 09:53 Potentially hazardous objects 13:53 Asteroid belt 15:52 Gateways cascade 17:44 Jupiter helped in an unexpected way |
Washing with melted ice would suck. Life in the Coldest Village on Earth -71°C (-95°F) A Journey Through All Four Seasons |
Think there was a thread about them months ago that went to archive. Failed To Load Title |
Pretty good short video on different bronze age collapses. The First Bronze Age Collapse and the Intermediate Bronze Age 00:00 The First Bronze Age Collapse 00:36 Setting the Stage in the Early Bronze Age 02:10 The Intermediate Bronze Age and Collapse Defined 02:38 The First Intermediate Period in Egypt 03:39 A Discussion between a Man and his Ba 05:04 The Democratization of the Afterlife and Religoin 05:50 The EB IV in the Southern Levant 07:30 The Northern Levant and Syria 09:40 Anatolia and Trevor Bryce 10:21 The Early Helladic Aegean 11:04 Akkadian Empires Collapse 12:22 The Curse of Akkad 13:40 Ur III 14:15 the 4.2 ky event and climate crisis 15:55 Non-climate causes for collapse 17:00 Middle Bronze Age recovery |
He always has some interesting takes on things. Chris Langan - The Interview THEY Didn't Want You To See - CTMU [Full Version; Timestamps] 00:04 Chris Langan, the smartest man, living on a farm in Missouri. 02:15 Pursued knowledge despite financial challenges. 05:54 Different perspectives on mental capability in mathematics 07:44 Chris Langan's decision to become a bouncer despite his intellect 11:25 Chris Langan was always eager to continue learning despite challenges. 13:13 Reality as logical geometric and the CTMU theory is about cognitive model of universe 17:15 CTMU defines identity as the core of reality. 18:59 Consciousness attributes everything to itself 22:41 God is not confined to the physical universe 24:31 God provides processing functionality for reality and causation. 28:13 Discussion on free will and compatibility of quantum field theory and fixed array 30:03 The manifold in classical physics has zero extent, making it a paradoxical construct. 33:34 Recognizing boundaries and metacausation 35:15 Concept of time and space in relation to events 38:45 Discussion about tobacco and drugs 40:29 Psychedelics may open up new insights and communication in consciousness 43:53 Satan can exploit corporate and governmental structures 45:48 Lucifer and Satan are different entities 49:15 Living in a world ruled by globalists 51:01 Discussion on intellectual production and individuals like Bill Gates 54:09 Conspiracy among elite groups impacts world dynamics. 55:49 The interviewee talks about his experience with political bias in a university application process. 59:09 Transition from Democrat to Conservative Politics 1:00:48 Some conservatives are submissive to liberals 1:04:03 Immigrants used to have to prove their value, now incentivized to hate America 1:05:50 Activism needed to protect rights in the current political situation 1:09:18 Intelligence agencies' interest in contradicting the liberal establishment agenda 1:11:10 Intelligence community's belief in aliens 1:14:34 UFO incident reporters are not all liars 1:16:07 Chris Langan had a mysterious encounter with a UFO while working in the forest service. 1:19:30 Importance of truth in communication 1:21:03 Discussion on hierarchy and unknown leadership in power 1:24:03 Choose to serve truth or mammon. 1:25:45 Higher education is an indoctrination factory. 1:29:06 The economy is a telec, a trading system in nature 1:31:02 Value of truth and meaning over money 1:34:30 Catholic church needs to address shedding of Christians 1:36:08 Beauty as tied to the sacred and teleology 1:39:34 Importance of traditional values in society 1:41:12 Recommendations of Non-Academic Philosophers 1:44:43 Chris Langan's exclusion from Wikipedia and encounters with critics 1:46:33 Influence of new atheists on the speaker's views on religion 1:49:54 Transition to discussing personal experiences with organized religion 1:51:35 Striving for truth over wealth 1:54:46 Transhumanist movement aims to displace reality by recreating it in a mechanical form. 1:56:33 Freedom from constraints and the importance of recognizing them |
Good short video on it. The Time It Rained for 2 Million Years - The Carnian Pluvial Event |
Few videos on bronze age copper mines in Europe. These Ancient Mines Transformed Prehistoric Europe 00:00 Neolithic Copper Mines 02:31 Ancient Copper Mining on Cyprus 04:25 Lead Isotope Analysis 05:27 Copper Trade in the Amarna letters 06:09 Oxhide Ingots 06:31 Mycenaean Copper Use 07:04 Copper mining on the Cycladic islands 07:36 Early Metalworking on Crete 07:57 Early Balkan mining and metallurgy 09:44 Yamnaya culture steppe miners of the Volga 11:18 Middle and Late Bronze Age European Mining 11:47 Unetice culture miners 13:33 Nordic Bronze Age Copper Imports 15:37 Mining in Bronze Age Britain and Ireland 16:28 Bronze Age Copper Mines of Europe  The Ancient Copper Mine that Transformed Britain 00:00 the Largest Prehistoric Mine 00:48 Video Sponsorship 02:00 The Great Orme Copper Mine 05:14 Prehistoric Mining Tools 06:45 19th Century Discovery 07:37 Fire Setting to Weaken Rock 08:20 Lighting in Ancient Mines 09:22 Mining in Bronze Age Britain 10:21 The Great Orme Miners 11:00 The Great Chiefs of the Mine 12:33 The Mold Cape 13:17 Where did all that copper go?  Copper Smelting & Bronze Casting at the Great Orme Copper Mines |
Short video on Project Lyra. A Bold Mission to Catch Up With 'Oumuamua | Project Lyra |
Pretty good documentary on each. The Lost Empires: How did the Maya, Akkadians and Sea People collapse? |
Interesting take on the election Why We Lost - Brianna Wu 00:00 Introduction 00:45 What Happened? 07:15 Democrats Need To Self-Reflect 13:20 Republicans Are Against Trans People 18:24 Monetary Metals Advert 19:28 I Lost Friends From Coming On TRIGGERnometry 20:36 Does Donald Trump Want To Leave NATO And Abandon Ukraine? 25:33 Can The Democrat Party Change? 33:10 The Left Needs Humility 40:20 SimpliSafe Advert 41:50 Kamala Harris' Poor VP Pick 45:20 Did The Democrats Think They Were Going To Win? 51:58 How Did Konstantin Avoid Taking A Position On Israel For So Long? 59:31 The Left Is Uncomfortable With The Use Of Force And Strength |
Talk about the Election and other things. Good as usual. How to Navigate Political Turmoil | Lessons from Jordan Peterson |
Video on Trappist-1 planets and a new model. Is there hope for JWST and the TRAPPIST-1 planets after all? 00:00 - Introduction 02:55 - AD Squarespace 04:22 - What’s been found about TRAPPIST-1 so far with HST and JWST 08:54 - What we think is happening with planet formation around red dwarf stars 13:27 - What this new model from Krissansen-Totton and collaborators is showing for the planets TRAPPIST-1b and 1e 18:31 - When will we finally get JWST results for TRAPPIST-1e? |
good long discussion about various aspects of the Romans. Ancient Rome Expert on Lost History, Alexander the Great & Egyptian Pyramids | Toldinstone • 251 00:00 - Getting into Roman History & Under Reporting Roman Empire 05:48 - The Rise of Julius Caesar, Battle of Pharsalus 15:48 - Augustus ‘Pax Romana’ Era, How Roman Republic Was Set-Up 22:35 - Strange History of Carthage, Hannibal Crossing Alps with Elephants 31:30 - Size of Roman Empire, Animal Diversity Exploding in Roman Empire 39:23 - Roman Fake News (Nero Assassination), Roman Tax System 48:51 - Battles (Truces, Civil Wars), General Marcus Licinius Crassus 01:01:27 - History of Tattoos (Slaves), Greeks & Roman Empire Collision 01:12:41 - Alexander the Great Convinced he was Son of God 01:20:03 - Conspiracies Around Alexander the Great’s Death 01:26:33 - Persians Conquering Egypt, Egyptian New Kingdom & Pyramid Creation 01:33:21 - Rome’s Rise to Power, Russian Control During Reign 01:43:11 - Who was Marc Anthony, Augustus Legacy 01:48:51 - Pax Romana Term, Truth & Determining Facts from Old Historical 01:57:04 - Vesuvius Challenge Explained AI Being Used for Recovering/Understanding History 02:02:18 - Academia vs Non-Trained Historians w/ Discoveries 02:11:08 - What was the Senate in Rome 02:17:03 - Tiberius Rule of Rome, Who’s Next in Rule 02:26:47 - Romans Tolerate Religious Groups: Jews, Christians, etc. Caligula 02:36:39 - Biggest Cities in the World during Empire, Eating Pig P***Y 02:46:10 - Monte Testaccio, Life in Rome and Cultural Setting/Location 02:51:23 - Most Common Occupations in Ancient Rome, Poverty in Rome 02:57:09 - Entertainment in Rome, Roman Money System |
Never head of this one before. AeroJet AJ-260. 5 million pounds of thrust. The Most Powerful Rocket Motor Ever Tested & Why it Never Made it to the Moon? |
Good discussion around it. His channel has a lot of good material on it. Where did POOR peasants stay when on a journey? |
Interesting tribe in Florida. The Calusa: Fishermen Kings of Florida Introduction: 1:31 SW Florida Environment: 3:19 Early SW Florida: 5:42 Caloosahatchee culture: 10:09 Calusa Society: 15:40 Calusa Beliefs: 24:31 Calusa Architecture: 29:04 Spanish Encounters: 35:02 End of the Calusa: 42:17 |
Interesting video around it and the differences between Hunter Gathers and Farmers. The Delicious Diets of Prehistoric Europe (Mesolithic, Neolithic, Bronze Age) 00:00 What did ancient people eat? 01:25 Video Sponsorship 02:56 The Mesolithic Diet 06:24 Mesolithic Hazelnut Processing 07:50 Mesolithic Proto-Farming 11:38 The Neolithic Diet 13:29 Neolithic Dairy Consumption 14:57 A Fish Eating Taboo? 16:49 Neolithic Feasting 18:05 What did Steppe Herders eat? 20:16 Broader Bronze Age Diets |
Guy's accent makes it a bit hard to understand, but a very interesting concept. Would be nice to get multiple 20 meter telescopes into orbit. Are Membrane Telescopes The Future of Space-Based Astronomy? 00:00 Intro 02:27 Adaptive optics in space 05:17 Membrane-based telescopes 22:48 Taking membrane telescopes to space 32:54 A practical next step 34:02 Questions from patrons 36:54 Working with ELT 44:30 More interviews |
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The concept of a membrane telescope was drawn on a napkin at a Pizza Hut by three Army Calibration Specialists in 1986 or 1987. Glad to see the idea getting traction. We hypothesized that positive reinforcement via Fransel lending would be possible on that scale, and drew an articulated framework for it to be carried up in a shuttle and deployed. God, how I miss those days and spitballing future tech over beer. |
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Originally Posted By SpanishInquisition: The concept of a membrane telescope was drawn on a napkin at a Pizza Hut by three Army Calibration Specialists in 1986 or 1987. Glad to see the idea getting traction. We hypothesized that positive reinforcement via Fransel lending would be possible on that scale, and drew an articulated framework for it to be carried up in a shuttle and deployed. God, how I miss those days and spitballing future tech over beer. Yeah, this is a bit different I think. They are talking about a temperature sensitive polymer that can change shape and using adaptive optics to smooth out any issues with the surface. Would be interesting to see if you could use metamaterials to give different focal points for different ranges of wavelengths of light to allow a single telescope to image in a much larger span of wavelengths. |
Short video on the copper mine at Kargaly. The Largest Prehistoric Copper Mine in the World 00:00 The Largest Ancient Mine 02:04 Warhammer 40,000 Tacticus 03:17 Yamnaya Copper Mining 04:47 Srubnaya Copper Mining 05:25 Ore Prospecting in the Bronze Age 06:23 Mining Techniques at Kargaly 08:33 Living and Working at Kargaly 10:40 Ritual Activity at Kargaly 12:12 Copper Exports 13:27 The End of Kargaly |
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Originally Posted By DaGoose: Yeah, this is a bit different I think. They are talking about a temperature sensitive polymer that can change shape and using adaptive optics to smooth out any issues with the surface. Would be interesting to see if you could use metamaterials to give different focal points for different ranges of wavelengths of light to allow a single telescope to image in a much larger span of wavelengths. Originally Posted By DaGoose: Originally Posted By SpanishInquisition: The concept of a membrane telescope was drawn on a napkin at a Pizza Hut by three Army Calibration Specialists in 1986 or 1987. Glad to see the idea getting traction. We hypothesized that positive reinforcement via Fransel lending would be possible on that scale, and drew an articulated framework for it to be carried up in a shuttle and deployed. God, how I miss those days and spitballing future tech over beer. Yeah, this is a bit different I think. They are talking about a temperature sensitive polymer that can change shape and using adaptive optics to smooth out any issues with the surface. Would be interesting to see if you could use metamaterials to give different focal points for different ranges of wavelengths of light to allow a single telescope to image in a much larger span of wavelengths. The issue there then becomes how to make use of that focal point. Far IR needs direct sensing and sensors aren't transparent. IR doesn't bounce around with optical mirrors. Some form of ultra wideband focal plane beam splitter would be needed. The Red/Green/Blue focal points changing is "Chromatic Aberration" which they design and coat the optics of lenses to hell and back to get rid of.  |
The person who complains most, and is the most critical of others has the most to hide.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
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Originally Posted By brass: The issue there then becomes how to make use of that focal point. Far IR needs direct sensing and sensors aren't transparent. IR doesn't bounce around with optical mirrors. Some form of ultra wideband focal plane beam splitter would be needed. The Red/Green/Blue focal points changing is "Chromatic Aberration" which they design and coat the optics of lenses to hell and back to get rid of. Think you are thinking of x-ray and higher telescopes needing direct sensing. All the near and far infrared telescopes that I'm aware of used a primary and secondary mirror. https://en.wikipedia.org/wiki/Herschel_Space_Observatory https://en.wikipedia.org/wiki/Spitzer_Space_Telescope https://en.wikipedia.org/wiki/Infrared_Space_Observatory |
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Originally Posted By DaGoose: Think you are thinking of x-ray and higher telescopes needing direct sensing. All the near and far infrared telescopes that I'm aware of used a primary and secondary mirror. https://en.wikipedia.org/wiki/Herschel_Space_Observatory https://en.wikipedia.org/wiki/Spitzer_Space_Telescope https://en.wikipedia.org/wiki/Infrared_Space_Observatory Originally Posted By DaGoose: Originally Posted By brass: The issue there then becomes how to make use of that focal point. Far IR needs direct sensing and sensors aren't transparent. IR doesn't bounce around with optical mirrors. Some form of ultra wideband focal plane beam splitter would be needed. The Red/Green/Blue focal points changing is "Chromatic Aberration" which they design and coat the optics of lenses to hell and back to get rid of. Think you are thinking of x-ray and higher telescopes needing direct sensing. All the near and far infrared telescopes that I'm aware of used a primary and secondary mirror. https://en.wikipedia.org/wiki/Herschel_Space_Observatory https://en.wikipedia.org/wiki/Spitzer_Space_Telescope https://en.wikipedia.org/wiki/Infrared_Space_Observatory \IR/UV/Xray. All just photons. When at the energies they're looking at, trying to capture several orders of magnitude in wavelength with one platform is a huge problem, since directing them is done entirely differently, waveguide, reflection, refraction, etc. There isn't a material uinversally transparent and a different enough velocity factor to make a lens for them of such a wide spectrum. As example for consumer end in cheap range. Visible and Near IR can be overlaid on a sensor but splitting out Far IR (heat) from optical doesn't work as easily from behind the same lens. The thermal cameras you hold in your hand use a separate visible light camera and IR sensor window to overlay the hot spots on the camera image in the LCD screen of the temp gun. |
The person who complains most, and is the most critical of others has the most to hide.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
Pretty good overview of the silk road The Real Impact of the Silk Road | Extra Long Historical Documentary |
Good short video on Roman bridges How much weight could a Roman bridge carry? Chapters 0:00 Introduction 0:25 Wooden bridges 1:42 Building a stone bridge 3:30 Exceptional bridges 4:13 Strength and durability 5:00 Calculating capacity 6:02 Roman bridge vs. freight train |
Another short one on Roman concrete. Why isn't Roman Concrete used today? Chapters: 0:00 The origins of concrete 1:25 Building with Roman concrete 2:49 Why the Romans didn't build skyscrapers 3:33 A hypothetical modern project 4:20 The "Insula" method 5:23 The "Colosseum" method 7:17 Possible, not comfortable |
Another short one on Diocletian's Great Persecution How Christianity Almost Vanished in 303 AD Chapters 0:00 Introduction 1:22 Diocletian and Roman religion 2:52 The Persecution of Decius 4:18 The Great Persecution begins 5:49 Later phases 7:31 Edicts of toleration 8:16 Consequences |
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Originally Posted By DaGoose: Think you are thinking of x-ray and higher telescopes needing direct sensing. All the near and far infrared telescopes that I'm aware of used a primary and secondary mirror. https://en.wikipedia.org/wiki/Herschel_Space_Observatory https://en.wikipedia.org/wiki/Spitzer_Space_Telescope https://en.wikipedia.org/wiki/Infrared_Space_Observatory Lol yeah. All IR systems use mirrors, from sidewinder to modern TGP's. |
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Originally Posted By brass: \IR/UV/Xray. All just photons. When at the energies they're looking at, trying to capture several orders of magnitude in wavelength with one platform is a huge problem, since directing them is done entirely differently, waveguide, reflection, refraction, etc. There isn't a material uinversally transparent and a different enough velocity factor to make a lens for them of such a wide spectrum. As example for consumer end in cheap range. Visible and Near IR can be overlaid on a sensor but splitting out Far IR (heat) from optical doesn't work as easily from behind the same lens. The thermal cameras you hold in your hand use a separate visible light camera and IR sensor window to overlay the hot spots on the camera image in the LCD screen of the temp gun. LOL You just split the beam for that shit. |
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Originally Posted By Harlikwin: LOL You just split the beam for that shit. Originally Posted By Harlikwin: Originally Posted By brass: \IR/UV/Xray. All just photons. When at the energies they're looking at, trying to capture several orders of magnitude in wavelength with one platform is a huge problem, since directing them is done entirely differently, waveguide, reflection, refraction, etc. There isn't a material uinversally transparent and a different enough velocity factor to make a lens for them of such a wide spectrum. As example for consumer end in cheap range. Visible and Near IR can be overlaid on a sensor but splitting out Far IR (heat) from optical doesn't work as easily from behind the same lens. The thermal cameras you hold in your hand use a separate visible light camera and IR sensor window to overlay the hot spots on the camera image in the LCD screen of the temp gun. LOL You just split the beam for that shit. I don't know of a perfect mirror for all wavelengths, for example, bandpass and focus everything longer than 700nm but shorter than 1200nm which is uniform and efficient. I suppose the sensors could be adjusted for gain across the attenuation profile of the mirror but it's not as easy as a focal screen for chromatic aberration, the mirror flattens those focal points and then it's more finicky bits, even with first surface mirrors. Then again, I think I may be overthinking the hell out of this and making a knot.  |
The person who complains most, and is the most critical of others has the most to hide.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
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Originally Posted By brass: I don't know of a perfect mirror for all wavelengths, for example, bandpass and focus everything longer than 700nm but shorter than 1200nm which is uniform and efficient. I suppose the sensors could be adjusted for gain across the attenuation profile of the mirror but it's not as easy as a focal screen for chromatic aberration, the mirror flattens those focal points and then it's more finicky bits, even with first surface mirrors. Then again, I think I may be overthinking the hell out of this and making a knot. You just split the beam into multiples and do whatever you want with em with whatever mirrors work best for whatever wavelength. Thats how you get "multispectral" sensors in a nutshell. |
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Originally Posted By brass: I don't know of a perfect mirror for all wavelengths, for example, bandpass and focus everything longer than 700nm but shorter than 1200nm which is uniform and efficient. I suppose the sensors could be adjusted for gain across the attenuation profile of the mirror but it's not as easy as a focal screen for chromatic aberration, the mirror flattens those focal points and then it's more finicky bits, even with first surface mirrors. Then again, I think I may be overthinking the hell out of this and making a knot. Originally Posted By brass: Originally Posted By Harlikwin: Originally Posted By brass: \IR/UV/Xray. All just photons. When at the energies they're looking at, trying to capture several orders of magnitude in wavelength with one platform is a huge problem, since directing them is done entirely differently, waveguide, reflection, refraction, etc. There isn't a material uinversally transparent and a different enough velocity factor to make a lens for them of such a wide spectrum. As example for consumer end in cheap range. Visible and Near IR can be overlaid on a sensor but splitting out Far IR (heat) from optical doesn't work as easily from behind the same lens. The thermal cameras you hold in your hand use a separate visible light camera and IR sensor window to overlay the hot spots on the camera image in the LCD screen of the temp gun. LOL You just split the beam for that shit. I don't know of a perfect mirror for all wavelengths, for example, bandpass and focus everything longer than 700nm but shorter than 1200nm which is uniform and efficient. I suppose the sensors could be adjusted for gain across the attenuation profile of the mirror but it's not as easy as a focal screen for chromatic aberration, the mirror flattens those focal points and then it's more finicky bits, even with first surface mirrors. Then again, I think I may be overthinking the hell out of this and making a knot. That's why metamaterials are so interesting, it may be possible to do things at multiple different wavelengths as the metamaterial structure is smaller than the wavelength of the light they are looking at, so in theory, you could have multiple different focal points/positions without using a beam splitter and getting the signal loss that they entail. There are rumors that there are a few companies working on atomic level 3d printing and if that actually works out, then metamaterials may explode in usefulness. https://www.researchgate.net/publication/357045138_Imaging_with_metamaterials https://news.fnal.gov/2021/02/new-metamaterials-for-studying-the-oldest-light-in-the-universe/ https://www.optica.org/about/newsroom/news_releases/2021/metamaterial_tiles_boost_sensitivity_of_large_tele/ https://penntoday.upenn.edu/news/metamaterial-tiles-boost-sensitivity-large-telescopes#:~:text=The%20testing%20showed%20that%20the,scattered%20photons%2C%E2%80%9D%20says%20Xu. https://en.wikipedia.org/wiki/Superlens |
Pretty good overview of the Stanford Torus habit. The Stanford Torus Space Habitat |
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Originally Posted By DaGoose: Pretty good overview of the Stanford Torus habit. https://www.youtube.com/watch?v=eQ8g1H7RnTASir, we live in O'neill Cylinders here. |
Pemberton the carbonated, behind his tasty bubbles, whispering of the love that is more horrible than hate.
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Originally Posted By RustedAce: Sir, we live in O'neill Cylinders here. Originally Posted By RustedAce: Originally Posted By DaGoose: Pretty good overview of the Stanford Torus habit. https://www.youtube.com/watch?v=eQ8g1H7RnTASir, we live in O'neill Cylinders here. He did mention that he would be covering other habit types over the winter.
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| all this research done & govt grants at big universitie's science depts filled with Chicom "grad" students... |
For since the creation of the world God’s invisible qualities, His eternal power and divine nature, have been clearly seen, being understood from His workmanship, so that men are without excuse.
Discussion around gravity and how it affects everything. The Fermi Paradox & Gravity: The Heaviest Obstacle To Life, The Universe... And Everything? |
Pretty good discussion around it. The comments had some interesting methods that might work to increase focus. Why we can't focus. |
Overview of a few spaceship designs that could get semi-close to the speed of light. Ultra-Relativistic Spaceships: Racing Towards the Speed of Light |