Podcasts about Lyapunov

Outline00:00 - Intro and early steps in control06:42 - Journey to the US08:30 - Kharitonov's theorem and early influences12:10 - From Lund to KTH (Stockholm)15:01 - Ascona and collaboration with Megretski24:06 - The IMA year in Minnesota33:50 - Integral quadratic constraints46:10 - KYP lemma and meeting Yakubovich52:35 - Piecewise hybrid systems59:41 - Dual to Lyapunov theorem1:06:48 -  Positivity and large scale systems1:15:25 - Adaptive and dual control1:25:24 - Future research directionsLinks Master's thesis: https://tinyurl.com/vnkuf44a Kharitonov's theorem: https://tinyurl.com/3w3a3z52IMA: https://cse.umn.edu/imaLCCC: http://www.lccc.lth.se/Real stability radius paper: https://tinyurl.com/yc79zt58IQC paper: https://tinyurl.com/mw2te4vwKYP lemma paper: https://tinyurl.com/2fv32yw6Piecewise quadratic Lyapunov functions for hybrid systems: https://tinyurl.com/38a5f432Piecewise linear quadratic optimal control: https://tinyurl.com/yhddbhpxFast switches in relay feedback systems: https://tinyurl.com/23e95k9nDual to Lyapunov's stability theorem: https://tinyurl.com/yc2uf652ECC'15 plenary: https://tinyurl.com/sy3k7vf7Scalable control of positive systems: https://tinyurl.com/3vcda447Tutorial on Positive Systems and Large Scale Control: https://tinyurl.com/3e4fkxz8KYP lemma for positive systems: https://tinyurl.com/3pdp3p7pCDC'25 plenary: https://tinyurl.com/497py5whData driven Riccati equation: https://tinyurl.com/3swjtvabSupport the showPodcast infoPodcast website: https://www.incontrolpodcast.com/Apple Podcasts: https://tinyurl.com/5n84j85jSpotify: https://tinyurl.com/4rwztj3cRSS: https://tinyurl.com/yc2fcv4yYoutube: https://tinyurl.com/bdbvhsj6Facebook: https://tinyurl.com/3z24yr43Twitter: https://twitter.com/IncontrolPInstagram: https://tinyurl.com/35cu4kr4Acknowledgments and sponsorsThis episode was supported by the National Centre of Competence in Research on «Dependable, ubiquitous automation» and the IFAC Activity fund. The podcast benefits from the help of an incredibly talented and passionate team. Special thanks to L. Seward, E. Cahard, F. Banis, F. Dörfler, J. Lygeros, ETH studio and mirrorlake . Music was composed by A New Element.

Do Balance Bikes lead to more functional variability in postural control when learning to ride a bike? Do they help support the transition from freezing to freeing degrees of freedom? Articles:Learning to Cycle: Why Is the Balance Bike More Efficient than the Bicycle with Training Wheels? The Lyapunov's Answer My Research Gate Page (pdfs of my articles) My ASU Web page Podcast Facebook page (videos, pics, etc)   Subscribe in iOS/Apple Subscribe in Anroid/Google   Support the podcast and receive bonus content   Credits: The Flamin' Groovies – ShakeSome Action Mark Lanegan - Saint Louis Elegy via freemusicarchive.org and jamendo.com

Return guest Zarin Mehta presents premieres of his own music and Augusta Read Thomas's, plus pieces by Bach, Beethoven, and Lyapunov. The post LIVE | Zarin Mehta, 16, piano and composer appeared first on WFMT.

Last time we spoke about the legendary battle of Tsushima. Admiral Rozhdestvenski traveled across the globe to bring the Baltic fleet to the Pacific to give a climactic fight to Admiral Togo's combined fleet. Yet during the journey, Port Arthur fell leaving the only destination to be Vladivostok and they would have to take a perilous journey through the Tsushima strait to get to her. Rozhdestvenski's grand journey meant his ships were ill maintained and the crews had no time for training. The Japanese meanwhile had trained vigorously and brought new technological advantages into the mix that would significantly tip the scale. The Russian baltic fleet was absolutely annihilated at a minimal lose for the IJN. The battle of Tsushima became one of the most famous naval battles in history and its decisive nature would become indoctrinated in the IJN until the end of WW2.    #84 The Russo-Japanese War part 11: The Portsmouth Treaty    Welcome to the Fall and Rise of China Podcast, I am your dutiful host Craig Watson. But, before we start I want to also remind you this podcast is only made possible through the efforts of Kings and Generals over at Youtube. Perhaps you want to learn more about the history of Asia? Kings and Generals have an assortment of episodes on history of asia and much more  so go give them a look over on Youtube. So please subscribe to Kings and Generals over at Youtube and to continue helping us produce this content please check out www.patreon.com/kingsandgenerals. If you are still hungry for some more history related content, over on my channel, the Pacific War Channel where I cover the history of China and Japan from the 19th century until the end of the Pacific War. I have to start this podcast by repeating a funny little bit from this week. One of my bosses over at Kings and Generals suddenly messages me on discord and says “hey what's going on with the China Podcast, are we doing a series on the Russo-Japanese War now?” And to this I laughed, because he had a good point, I am sure there are a lot of you who were wondering….well why are we spending so much time on this, if the Fall and Rise of China podcast is ..well about China. The Russo-Japanese War would have a profound effect on China and global history. Something many forget, this entire war occurred within China, a nation not officially taking part in the conflict! Having a war break out between two other empires within your borders was an absolutely humiliating situation. China had just lost a war against the Russians in Manchuria. When the war broke out, China declared neutrality and asked both sides to not violate her territory, which both did without a care in the world. The Chinese did help the Japanese, especially the Honghuzi. Now the 1st Sino-Japanese War had left quite a foul taste in the mouth of the Chinese, but during the Russo-Japanese War some Pan-Asianim did develop. The Chinese public gradually began supporting the Japanese, there were quite a lot of youth in China demanding the Qing government allow them to enlist and help fight off the Russians. Countless Chinese helped with labor, working in a vast spy network and sold both sides provisions. When the Russians lost the battle of Tsushima and Mukden, there were many influential and future influential figures that celebrated this. Notably Mahatma Gandhi, Mustafa Kemal Ataturk, Jawaharlal Nehru and Sun Yat-Sen were deeply influenced by the Japanese victory. Why were they so influenced, because it was the first time a non-white nation had defeated a white one, and not just that, one of the great powers. The Russian Empire was in the public's mind, defeated handily by a small asiatic nation, it was a david and goliath story come true. Ironically, the Yellow Peril which Kaiser Wilhelm had utilized to usher in the war was turned up to 100 when the Japanese won.Now all that is fine and dandy, but there was another dramatic effect this war would hold over Japan and China. We technically have not spoken about “the end” of the Russo-Japanese War, there is actually another battle and the peace negotiations to discuss. It is here things will occur that will actually lay the groundwork for WW2. So now we are heading back into the story. The Japanese had won at Mukden and now at Tsushima, so that was that, they had won the war right? The Russians had taken up a new defensive position in northern Manchuria and were still being reinforced, 2 corps were enroute. In the war of attrition, the Russians would eventually win, despite having no naval ability, they would simply overwhelm the Japanese with numbers. Both nations faced bankruptcy, but the Russians were able to take larger loans from France and Germany, thus the situation was from a financial point of view more perilous for Japan. 53% of Japan's annual revenue had been devoted to the war effort. For Russia, the humiliation and financial ruin was accompanied by a full blown revolution. Thus both nations really needed the war to end and fast. Now comes in my favorite US president, Theodore Roosevelt. Roosevelt was one of the few at the offset of the war to place his bet on a Japanese victory. He also attempted to resolve the disputes between the two empires before the war broke out, often citing the Kaiser's Yellow Peril propaganda as being a main culprit to the hostilities. Roosevelt wrote to the British diplomat, Cecil Spring Rice that he believed Wilhelm should bear partial responsibility for the war "as he has done all he could to bring it about". Roosevelt is a fascinating figure. He was of course a product of his time, a 19th century man, he had views of white superiority, but demonstrated a certain tolerance towards nonwhites. This extended itself a lot towards the Japanese, there was a lot about the Japanese he admired. After the battle of Tsushima Roosevelt wrote “even the battle of Trafalgar could not match this. I grew so excited that I myself became almost like a Japanese, and I could not attend to official duties.” Roosevelt famously practiced judo with Japanese opponents and avidly read Nitobe Inazo's “Bushido”. Roosevelt was sent many books from his friend at Harvard, Kaneko Kentaro and wrote in appreciation “Perhaps I was most impressed by this little volume on Bushido. …It seems to me, my dear Baron, that Japan has much to teach to the nations of the Occident, just as she has something to learn from them. I have long felt that Japan's entrance into the circle of the great civilized powers was of good omen for all of the world.Certainly I myself, hope that I have learned not a little from what I have read of the fine Samurai spirit, and from the way in which that spirit has been and is being transformed to meet the needs of modern life.” In some ways perhaps you could call Roosevelt a Japanophile, but I would stress, like any white elites of the 19th century, he still had ingrained in him a sense that whites, notably white anglo saxons were the most civilized in the world.  It should come to no surprise, Roosevelt who publicly spoke well of the Japanese during the war, found the Japanese coming to him to help mediate the peace. Now as much as Roosevelt had openly favored the Japanese during the conflict, now there was a looming issue on the American president's mind. The Japanese were aggressively expanding in Asia and the Pacific, this was not something Roosevelt liked very much. After the fall of Port Arthur, Roosevelt wrote “if Japan tries to gain from her victory in the Russo-Japanese War more than she ought to have, she will array against her all the great powers, and however determined she may be she cannot successfully face an allied world”. Roosevelt was greatly troubled by the potential threat Japan posed against America's own increasing strength and influence in the asia-pacific. He would dispatch one General Arthur MacArthur, for you Pacific War week by week podcast listeners, yes I managed to bring MacArthur into this one. Arthur MacArthur was sent on a tour of the far east in 1905 and he was of course accompanied by his wife and a young Lt Douglas MacArthur who would go on to write ‘The purpose of our observations was to measure the strength of the Japanese Army and its method of warfare … But I had the uneasy feeling that the haughty, feudalistic samurai who were their leaders, were, through their victories, planting the seed of eventual Japanese conquest of the Orient.' No worries I am not going to turn this into a MacArthur rant. Roosevelt's agreed to act as a mediator before the battle of Tsushima. After the Tsushima victory, the Japanese expected they would receive large benefits from peace talks. They had good reason to believe so, Russia had lost on the land and sea, revolution was burning within the empire. Anarchists attacked the Tsar's uncle and brother in law, Grand Duke Serge Alexandroitich, the governor general of Moscow. Riots and anti-war demonstrations were widespread, violence was found in major Russian cities. From the Russian point of view, the Japanese had committed all her available manpower in the field, thus only mediation could save Japan from incoming disaster. In many ways it was a kind of race, who would run out of men first? Japan because she literally had a much smaller population, or would the Russian people simply overthrow the Tsar regime? Both regimes also were verging bankruptcy, whose dollar would run out first? Russia had not lost any of “her” territory, something Roosevelt was quick to point out to the Japanese. Thus Roosevelt was sort of winking at the Japanese that they should secure Russian territory so they had more bargaining power at the peace table, so the Japanese went to work. Japan and Russian had signed a treaty in 1875, the Treaty of Saint Petersburg that saw Japan ceding part of Sakhalin island to Russia in exchange for the Kuril islands. Now by the time of the Russo-Japanese war the population of Sakhalin was roughly 30,000 including 4000 Ainu. The island held a large prison and was used as a place for those Russia sought to exile. Overall it was not a very significant territory to the Russians. Its climate as you can imagine, was quite harsh, even by Russian standards. The Russians had a garrison of 7280 men on the island, the majority were conscripted farmers, hunters and prisoners with little in terms of training or equipment. They were led by General Mikhail Nikolaevich Lyapunov, who had been appointed military governor of Sakhalin in 1898. He had joined the military academy at the age of 16, but quickly found a talent in law, so he became a lawyer, while continuing his military career on the side. Thus the man was not particularly experienced in terms of war.  After the battle of Tsushima, the Japanese quickly wrangled together a force of 14,000 men for the brand new 13th IJA division led by General Haraguchi Kensai. Admiral Kataoka Shichiro assembled a naval force at Aomori Bay of 8 armored cruisers, 9 destroyers, 4 coastal defense ships and 12 torpedo boats to transport the division for an invasion of Sakhalin. The naval force departed on July 5th and landed in Aniwa Bay and near the port of Korsakov. They faced little opposition, a second group landed closer to Korsakov where they destroyed a battery of field artillery and defeated a small Russian force. The Japanese quickly advanced against Korsakov the next day, but the garrison of 2000 Russians led by Colonel Josef Arciszweski there had burned it to the ground. On July 8th the IJN force cleared Chitose Bay and on the 10th occupied Kindo Cape. Meanwhile the 13th division advanced north, taking the village of Vladimirovka. Colonel Arciszweski had dug to resist the Japanese, but his force was quickly outflanked and they withdrew into mountains within the interior of the island. By July 16th, Arciszweski surrendered his forces. Around 200 Russians were captured, the Japanese had suffered 18 deaths and 58 wounded. On the 17th 1905 General Lyapunov, through a representative, sent a message to General Kensai "Your Excellency! The lack of medicines and dressings and, as a result, the lack of the possibility of rendering assistance to the wounded, forced me to propose to Your Excellency to cease hostilities for purely humane reasons." General Haraguchi responded by demanding that General Lyapunov surrender all weapons and all movable and immovable state property that were intact, as well as the surrender of all maps, documents, papers related to the military department and administration. On the 19th General Lyapunov at his headquarters in the village of Onor gave the order: "The lack of food and firearms, as well as entrenching tools, the lack of sanitary facilities, the enormous numerical superiority of the Japanese army and the absence of a prepared path of retreat put us in such a situation when which further resistance would be useless bloodshed. In view of this, having received an offer from the commander of the Japanese army, which landed on the island, to surrender, I convened a military council, at which, to discuss the general situation...". On the 24th the Japanese landed in northern Sakhalin near Alexandrovsk-Sakhalinsky. The Russians had 5000 troops under the direct control of General Lyapunov. Lyapunov chose to flee the city with his forces and later surrendered seeing the Japanese capture 3200 men, 79 officers and General Lyapunov. He was the only Russian governor to surrender during the war. The Japanese would also capture another 1260 soldiers around Onor with a large stockpile of weapons, ammunition and food. After all was said and done, the battle for Sakhalin saw the Russians suffer 181 deaths, thousands taken prisoner. With that done with, the Japanese now had officially seized Russian territory. Alongside this the Japanese re-signed the Anglo-Japanese alliance for another 10 years and entered talks with the US regarding their positions over Korea and the Philippines. The Taft-Katsura agreement between William Howard Taft and Count Katsura Taro saw the US agree Japan should seek a protectorate over Korea, and Japan agreed the Philippines should be left under the good governance of the US. It should be noted this was all “a agreement” nothing was signed. In many ways it was a betrayal of Korea by the US, as the Americans and Koreans had signed an amity and commerce treaty in 1882, which the Koreans assumed was a mutual defense treaty. Regardless, the Japanese were securing their poker hand before heading into the negotiations. The peace negotiations were held at Portsmouth, New Hampshire. The Russian peace team was led by Sergius Witte who quickly stressed Russia had not been beaten and the war was very much still on. He also began privately complaining to all that it was his view the Japanese sought to gain as much loot from an agreement as possible. He was 100% correct in that assumption. Witte also made it clear, the Tsar's position in regards to Korea had not changed and that Russia would never pay a rouble in war indemnities. The Japanese were lead by Baron Komura, a harvard graduate. He came into the negotiations immediately demanding Korea was in the sphere of Japanese influence, that the Russians should depart Manchuria, the cession of Sakhalin, the granting of new fishing rights along the Russian coast, the spoils of war to be agreed upon and of course a fat sum of war indemnities. The teams had arrived on August 8th of 1905, and would stay at the Hotel Wentworth in New Castle. The actual negotiations took place at the General Stores Building, furnished with Mahogany furniture from the Cabinet Room of the White House. The conference was arranged so the most difficult parts would come last, namely, indemnities and Sakhalin. There were 12 sessions held between August 9th to the 30th. During the first 8 sessions, both sides reached an agreement on 8 points.  There should be an immediate ceasefire. The Russians would recognize  Japanese claims over Korea. The Russian forces would evacuate Manchuria.  Russia would cede its leases over Port Arthur and Dalien, the South Manchuria Railway and some mining concession, and Russia would retain the Chinese Eastern Railway in northern Manchuria. The next 4 points were much trickery.  On August the 15th the two vexed subjects were brought forth, Sakhalin and indemnity payments. It seemed the American public opinion over these issues had swung to the Russians. Witte, briefed by the Tsar stated there would be no payments for the return of Sakhalin and no indemnities, and stressed the Russians remained resolved to continue fighting. The Russians were very aware of Japan's financial distress and concluded that a demand for indemnity would be their most pressing concern. During the talks Roosevelt would later write ‘This (the indemnity) would never have been entertained by him, and he had calculated that the Peace Conference would break down on this point, and the struggle be continued until Japan could raise no more money.'On the issue Roosevelt intervened and advised the Japanese that if she did not abandon her claims for an indemnity, the world would come to believe the war had been fought for financial gain. Roosevelt on the 18th proposed dividing Sakhalin. Witte countered this on the 23rrd proposing Japan keep Sakhalin and drop her claims of indemnities. Komura rejected this proposal prompting Witte to warn him he was instructed to cease negotiations and resume the war. This ultimatum was met by 4 new Russian divisions arriving to Manchuria and Witte made a public display of literally showing everyone himself packing his bags preparing to leave. The Russians were convinced the Japanese could not afford to resume the war and were making a grand display to the Americans and Japanese that Russia would never agree to paying a single rouble. Komura was not in a good position and caved into the demands. The Japanese agreed in exchange for the southern half of Sakhalin they would drop their claims for indemnities. On September 5th, the treaty was signed, and ratified on the 10th of October in Japan, and the 14th for Russia. A random little side note, during the war Montenegro had declared war on Japan, but everyone kind of forgot about this and no mention of Montenegro was made in the treaty so technically Japan and Montenegro were at war until 2006 when Japan officially ended the war. Witte wrote to the New York Times about the treaty “The judgement of all observers here, whether pro-Japanese or pro-Russian, is that the victory is as astonishing a thing as ever was seen in diplomatic history. A nation hopelessly beaten in every battle of the war, one army captured and the other overwhelmingly routed, with a navy swept from the seas, dictated her own terms to the victory”. His rather bombastic claims were well warranted as the treaty signing had a profound effect on Japan. The Japanese public exploded. The over taxation for the war effort, the loss of so many sons and fathers had prompted the Japanese public to believe they were owed a lot. From the point of view of the Japanese public, the only news they received was endless victories over the lands and seas, they had no idea of the financial plight of their nation. When they heard the terms of the treaty, riots exploded. The most famous riots occurred in Hibiya Park in central Tokyo where activities and protesters assembled some 30,000 people strong. They marched upon the Imperial Palace grounds and rampaged the city for over 2 days. They especially targeted government buildings, the police, Russian property, but notably that of the US. From the publics view, Roosevelt and America had backstabbed them. Russian and American missionary churches were vandalized, martial law was erected. Over 350 buildings were damaged, 17 people were killed, 450 policemen, 48 firemen and civilians were injured. Prime Minister Katsura Taro's cabinet collapsed. While Roosevelt earned a nobel peace prize for his efforts, Japan's extremely positive view of America had dramatically soured. Its hard to picture it given the history of WW1 and WW2, but until this point America was kind of seen as a good big brother to Japan all things considered. The Japanese felt cheated of their rightful claims as victors of the war. Take this into consideration. During the 1st sino-Japanese War, Japan was denied her spoils by the triple intervention of France, Germany and Russia. During the Boxer Rebellion, the Russians used the situation to encroach into Manchuria, which Japan saw as a direct threat. Japan from her perspective won the Russo-Japanese War and now the US was stealing her spoils from her. From the Japanese perspective she deserved recognition as a great power and furthermore recognition as being racially equal. I wont delve to deeply into it, but after WW1, Japan would receive another similar and egregious wound when President Woodrow Wilson denied Japan's request to be recognized as racially equal to the other great powers. That would become the last straw, that drove Japan away from the west and towards WW2. But this is not a Japanese podcast haha, I apologize if I sometimes go in that direction its what I specialized in.  The Russo-Japanese War saw the Japanese suffer 58,000 to 86,000 deaths, for the Russians it was between 43,000 and 120,000. Of the casualties, the Japanese had lost perhaps 59,000 from combat, 27,000 from disease. For the Russians 34-53,000 died from combat and 9-19,000 from disease with another 75,000 captured. And let us not forget the Chinese who would see 20,000 civilian deaths and a financial loss of over 69 million taels. While the Japanese treated the tens of thousands of Russian prisoners extremely well considering what POW treatment would look like during WW1 and WW2, the treatment of Chinese was abysmal. The war between Russia and Japan occurred on Chinese soil, but China was powerless to prevent it and suffered human and financial loss. This added to the Chinese public's sense of humiliation. Alongside this, the treaty of Portsmouth basically started an annexation process of Korea to Japan, but it also handed a ton of privileges and extraterritorial rule over to Japan. Now Japan had her feet firmly set in Manchuria, weakening Qing rule. If you were part of the elites in the Qing dynasty and your responsibility was to improve the empire, it seems investigating how Japan beat Russia should be on top of your list of “to do's”.  Indeed, as we spoke a lot about during the 1st sino japanese war, Japan and China took different paths to modernization in the face of western imperialism. Japan did not defeat Russia solely because of the modernization of her army, Japan had thoroughly organized and prepared her populace for modern politics, military, economic, social and culture….while China struggled behind. China needed to emulate certain aspects, like Japan had to strengthen herself. When Japan and Russia signed the treaty of Portsmouth they were exchanging benefits and many of these were not theirs to take or give, but rather Chinas! Imagine you were a subject of the Qing dynasty living in Manchuria where your home may have been destroyed, perhaps you lost loved ones to the conflict, what did your government do? Nothing. It was a watershed moment for the common people of China, their government did absolutely nothing in the face of all of it. The intellectual class of China was enraged and invigorated by it all. There was this tremendous sense they as a people needed to improve in terms of politics, military, societal, economic, education and culture, China needed to actually modernize. The Qing dynasty was being seen by many as decrepit, too old and stuck in its ways.   In the historical context China was entering the “late Qing reforms” or “new policies” period. This actually began in 1901, but I believed it was very important to get the Russo-Japanese War story into the mix before I dabbled into this very complex part of modern Chinese history. The Qing dynasty is soon coming to its end. Stating all of that I thought it would be a cool time to do a bit of housekeeping. You Mr or Mrs listener, I'd love to hear from you. As you likely know I write and narrate the two podcast Pacific War week by week and the Fall and Rise of China Podcast's for Kings and Generals. However, I also happen to be a Youtuber, and Podcaster on the side. I have the Pacific War Channel where you can find content about the history of Asia from the 1830's until the end of the Pacific war in 1945, in many ways its like this podcast. I also awkwardly have a podcast platform called “the pacific war channel”, and as you can imagine its a bit directionless since …well lets be honest its redundant given these two podcasts I do. I have been trying to think about how to change that podcast around and I would love to hear from you guys. Best way to give feedback, toss comments on my Youtube channel, or join my Pacific War Channel discord, found on my Youtube channel page. I have a few idea's myself, perhaps doing a more general history focused podcast where I tell stories just like the Fall and Rise of China Podcast, but my god in much short series haha, let's say in 3 parters and such. Or I could do an entire other podcast series on The Rise and Fall of Japan, see what I did there with the titles? Yeah that ones been in the back on my mind for awhile. I could also take on a co-pilot for the podcasts so its not only single narration, similar to Tom Holland's “the rest is history”. There's a ton of directions I can go in, but one thing is for sure, the “Pacific War Channel Podcast” needs a new direction, probably a new name as well.  Also and I know its annoying, but a big thank you to all of you who check out the Pacific War channel on Youtube and my Patreon where I make monthly patreon exclusive podcasts. I would love to go full time one day, but alas the Youtube game is a hard one. If you get the chance please check out my Youtube channel, I am now as we speak unleashing a multiple part series on the Japanese invasion of Manchuria 1931-1932, something barely anyone covers. Most historians give it about a few paragraphs, but it was quite a complicated event. I am trying to tackle the 15 year war between Japan and China from 1931-1945 in a chronological order, event by event and such. Stating all of that I love all you guys, and here comes the same outro I do every single time haha. I would like to take this time to remind you all that this podcast is only made possible through the efforts of Kings and Generals over at Youtube. Please go subscribe to Kings and Generals over at Youtube and to continue helping us produce this content please check out www.patreon.com/kingsandgenerals. If you are still hungry after that, give my personal channel a look over at The Pacific War Channel at Youtube, it would mean a lot to me. One Empire has Risen like a bright Sun as another, tumbles down like a large bear. Asia henceforth will completely change, now the Japanese dominate the landscape. Yet what of China? How will the common Chinese take to this latest round of humiliation? The Qing dynasty is hanging by a thread and that thread is about to be cut. 

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2023.07.15.549166v1?rss=1 Authors: Boute, J., Destexhe, A. Abstract: In the awake brain, cerebral cortex displays asynchronous-irregular (AI) states, where neurons fire irregularly and with low correlation. Neural networks can display AI states that are self-sustained through recurrent connections, or in some cases, need an external input to sustain activity. In this paper, we aim at comparing these two dynamics and their consequences on responsiveness. We first show that the first Lyapunov exponent (FLE) can differ between self-sustained and driven networks, the former displaying a higher FLE than the late. Next, we show that this impact the dynamics of the system, leading to a tendency for self-sustained networks to be more responsive, both properties that can also be captured by mean-field models. We conclude that there is a dynamical and excitability difference between the two types of networks besides their apparent similar collective firing. The model predicts that calculating FLE from population activities in experimental data could provide a way to identify if real neural networks are self-sustained or driven. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC

The Phase Space Structure in the vicinity of vertical Lyapunov orbits around L1,2 in a barred galaxy model by M. Katsanikas et al. on Wednesday 21 September We study the phase space structure and the orbital diffusion from the vicinity of the vertical Lyapunov periodic orbits around the unstable Lagrangian points L1,2 in a 3D barred galaxy model. By perturbing the initial conditions of these periodic orbits, we detected the following five types of orbital structures in the 4D spaces of section: (i) Ring-like structures, sticky for large time intervals to the unstable invariant manifolds of the simple and double unstable vertical Lyapunov periodic orbits. (ii) 2D tori belonging to quasi-periodic orbits around stable periodic orbits existing in the region. They are associated either with vertical stable periodic orbits around L4,5 or with "stable anomalous" periodic orbits. (iii) Orbits sticky for large time intervals to these tori, forming "sticky tori", before they slowly depart from them. (iv) Clouds of points that have a strong chaotic behavior. Such clouds of consequents have slow diffusion speeds, because they are hindered by the presence of the tori around the "stable anomalous" periodic orbits. (v) Toroidal zones consisting of points that stick for long time on the unstable invariant manifolds of the "unstable anomalous" periodic orbits. By continuing the integration, we find that eventually they become strongly chaotic, retaining however small diffusion speeds, due to the presence of the tori around the stable anomalous periodic orbits. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.10249v1

Neste programa, o maestro João Mauricio Galindo responde perguntas sobre biografia de Jacqueline du Pré retratada no filme “Hilary e Jackie”, do diretor Anand Tucker; Georg Kulenkampff e a sua carreira; “As Variações Goldberg” de Johann Sebastian Bach; “As Variações Diabelli” de Ludwig van Beethoven; Sergei Lyapunov e suas composições.

This week, we are pleased to share two miniatures from Russian pianist and 2022 Honens Quarterfinalist Dmitry Yudin. The first piece is a familiar work by Mendelssohn, transcribed by Rachmaninov, and the second is a work by the less well-known early 20th century composer Sergei Lyapunov.These two pieces are ones Dmitry never tires of playing. He says each has "its own unique character: a mysterious, elegant, and ironic scherzo, and a very temperamental and virtuosic Russian dance, the Lezghinka."Let's listen.-Watch the video edition of this excerpt here. 

Value: After Hours is a podcast about value investing, Fintwit, and all things finance and investment by investors Tobias Carlisle, Bill Brewster and Jake Taylor. See our latest episodes at https://acquirersmultiple.com/ About Jake: Jake is a partner at Farnam Street. Jake's website: http://farnam-street.com/vah Jake's podcast: https://twitter.com/5_GQs Jake's Twitter: https://twitter.com/farnamjake1 Jake's book: The Rebel Allocator https://amzn.to/2sgip3l About Bill: Bill runs Sullimar Capital Group, a family investment firm. Bill's website: https://sullimarcapital.group/ Bill's Twitter: @BillBrewsterSCG ABOUT THE PODCAST Hi, I'm Tobias Carlisle. I launched The Acquirers Podcast to discuss the process of finding undervalued stocks, deep value investing, hedge funds, activism, buyouts, and special situations. We uncover the tactics and strategies for finding good investments, managing risk, dealing with bad luck, and maximizing success. SEE LATEST EPISODES https://acquirersmultiple.com/podcast/ SEE OUR FREE DEEP VALUE STOCK SCREENER https://acquirersmultiple.com/screener/ FOLLOW TOBIAS Website: https://acquirersmultiple.com/ Firm: https://acquirersfunds.com/ Twitter: https://twitter.com/Greenbackd LinkedIn: https://www.linkedin.com/in/tobycarlisle Facebook: https://www.facebook.com/tobiascarlisle Instagram: https://www.instagram.com/tobias_carlisle ABOUT TOBIAS CARLISLE Tobias Carlisle is the founder of The Acquirer's Multiple®, and Acquirers Funds®. He is best known as the author of the #1 new release in Amazon's Business and Finance The Acquirer's Multiple: How the Billionaire Contrarians of Deep Value Beat the Market, the Amazon best-sellers Deep Value: Why Activists Investors and Other Contrarians Battle for Control of Losing Corporations (2014) (https://amzn.to/2VwvAGF), Quantitative Value: A Practitioner's Guide to Automating Intelligent Investment and Eliminating Behavioral Errors (2012) (https://amzn.to/2SDDxrN), and Concentrated Investing: Strategies of the World's Greatest Concentrated Value Investors (2016) (https://amzn.to/2SEEjVn). He has extensive experience in investment management, business valuation, public company corporate governance, and corporate law. Prior to founding the forerunner to Acquirers Funds in 2010, Tobias was an analyst at an activist hedge fund, general counsel of a company listed on the Australian Stock Exchange, and a corporate advisory lawyer. As a lawyer specializing in mergers and acquisitions he has advised on transactions across a variety of industries in the United States, the United Kingdom, China, Australia, Singapore, Bermuda, Papua New Guinea, New Zealand, and Guam.

durée : 00:14:30 - Florian Noack : Lyapunov 12 Etudes d'exécution transcendante - Le jeune pianiste belge sortira le 4 novembre prochain son nouvel album consacré à Lyapunov, sous le label Dolce Volta. Emilie et Rodolphe vous en parlent !

durée : 01:57:18 - En pistes ! du jeudi 28 octobre 2021 - par : Emilie Munera, Rodolphe Bruneau Boulmier - Au programme : Florian Noack, El Gran Teatro Del Mundo, Anna-Liisa Eller, Claudio Arrau, Jonathan Fournel et toujours notre focus sur le ténor sicilien : Giuseppe di Stefano !

Doç. Dr. Serhan Yarkan ve Halil Said Cankurtaran'ın yer aldığı Bilim Tarihi Serisi'nin bu bölümünde, 7 Şubat 1889'da doğan ve 4 Nisan 1976'da hayata gözlerini yuman Harry Nyquist üzerine konuşulmuştur. Bell Laboratuvarları'nın bir çalışanı olan Nyquist, 130'dan fazla patente sahip olup, 12 adet de bilimsel makale yayınlamıştır. Gürültü Kavramına Giriş bölümümüzde de değindiğimiz üzere Nyquist, ısıl gürültü alanında önemli çalışmalara imza atmıştır. Laplace ile ilgili bölümümüzde girişini yapmış olduğumuz sistemlerin kararlılığı konusunda da çalışmaları bulunmaktadır. Ayrıca, Nyquist'in Bilgi Kuramı ve Haberleşme Kuramı'na yaptığı katkılar günümüz sayısal teknolojilerinin temellerini oluşturmaktadır. Bell Laboratuvarları'nda yapılan çalışmalara da değindiğimiz bölümümüzde, Claude Elwood Shannon, Ralph Hartley, Norbert Wiener, Lyapunov, Chebyshev, Kolmogorov, ve Smirnov gibi bilim insanlarının isimleri de anılmaktadır. Keyifli Dinlemeler. #66. George Gamow ve Bilim Anlatıcılığı (Bilim Tarihi Serisi B1: I. Kısım) - 25/10/2020: https://youtu.be/qIARyX8p8lg #68. Bilim Tarihi Serimize Bir Önsöz (Bilim Tarihi Serisi B2) - 08/11/2020: https://youtu.be/FVUc5tfYi7I #70. George Gamow - Bilimde Doğu ve Batı Blokları (Bilim Tarihi Serisi B3: II. Kısım) - 22/11/2020: https://youtu.be/7k_IRL_B8WA #71. Michael Faraday (Bilim Tarihi Serisi B4) - 29/11/2020: https://youtu.be/OtEQ0pI-baI #73. Kümeler Kuramı'nın Önemi ve Tarihsel Gelişimi (Bilim Tarihi Serisi B5: I. Kısım): https://youtu.be/pSksJkWK6wU #76. Kümeler Kuramı'nın Etkileri (Bilim Tarihi Serisi B6: II. Kısım): https://youtu.be/gtpdAUaCgzw #77. Kümeler Kuramı ve Hesaplama (Bilim Tarihi Serisi B7: III. Kısım): https://youtu.be/TMt_rUbE4M4 #78. Kümeler Kuramı'nın Kuraltanımazları (Bilim Tarihi Serisi B8: IV. Kısım) - 17/01/2021: https://youtu.be/qHMdAjr4lQ0 #79. Kümeler Kuramı'nın Günümüzdeki Kullanımı (Bilim Tarihi Serisi B9: V. Kısım) - 24/01/2021: https://youtu.be/WoF5_A7nKQM #84. Gürültü Kavramına Giriş (Bilim Tarihi Serisi B10: I. Kısım) - 28/02/2021: https://youtu.be/4nCgno6XDVM #88. Pierre-Simon, Marquis de Laplace (Bilim Tarihi Serisi B11: I. Kısım) - 28/03/2021: https://youtu.be/-jRuE37K_M0 Tapir Lab. GitHub: @TapirLab, https://github.com/tapirlab/ Tapir Lab. Instagram: @tapirlab, https://www.instagram.com/tapirlab/ Tapir Lab. Twitter: @tapirlab, https://twitter.com/tapirlab Tapir Lab.: http://www.tapirlab.com

If you’ve been reading popular science websites or magazines lately, then you may have heard the news: we don’t understand how airplanes work. For example: This fact may surprise you, g… https://www.ribbonfarm.com/2021/04/08/heres-why-we-dont-understand-heavier-than-air-flight/ the universe is a giant energy minimization machinemillion dollar prize to be hadLyapunov timevery high

The pole skipping phenomenon is a subtle effect in the thermal energy density retarded two point function at a special point in the complex frequency and momentum planes. For maximally chaotic theories, this special point is related to data characterising the butterfly effect, and is explained by a common dynamical origin of energy transport and scrambling. I will argue that pole skipping also happens in non-maximally chaotic theories and its location corresponds to the stress tensor contribution to many body chaos. I will test this proposal in the large q limit of an SYK chain, where I determine both the Lyapunov growth of the OTO correlator and the energy density two point function exactly as a function of the coupling, interpolating between weekly coupled and maximally chaotic behaviour.

It's getting to be the time of year where sparkling lights adorn green trees set against a background of snow. Join us for a cozy episode this week about Lypunov and his take on Russian Christmas music! Music: https://imslp.org/wiki/F%C3%AAtes_de_No%C3%ABl%2C_Op.41_(Lyapunov%2C_Sergey) https://creativecommons.org/licenses/by-nc/4.0/legalcode

[Music Analysis] Lyapunov Diaries, Op. 4 'Piano Concerto No. 1' by Ed Makes Books and Music

[Music Analysis] Lyapunov Diaries op. 3 'Rêverie du soir' For piano by Ed Makes Books and Music

[Music Analysis] The Lyapunov Diaries, op. 2: 'Ballade' For Orchestra by Ed Makes Books and Music

[Music Analysis] The Lyapunov Diaries Introduction by Ed Makes Books and Music

[Music Analysis] The Lyapunov Diaries, op. 1: Three Pieces for Piano by Ed Makes Books and Music

In this lecture, Professor Trefethen discusses planetary motions, chaos and Lyapunov exponents, the Lorenz equations, and lastly Sinai billiards and the SIAM 100-digit challenge.

Intro The Orbital Mechanics highlighted how little we know about planetary formation, so let’s talk about Pluto and what we’ve learned from the New Horizons Mission. Pluto Basics Officially a dwarf planet in the Kuiper belt About 0.18 the radius of Earth Mass 0.178 of the moon’s Very low density Gravity 0.63 g Neptune and Pluto were both predicted to exist from orbital perturbations of Uranus Percival Lowell (founder of Lowell observatory) started the hunt for pluto in 1906. Tombaugh found Pluto using a blink comparison technique Moons of Pluto Orbit is chaotic, we can predict forwards and backwards for several million years, but over the Lyapunov time we have no idea. New Horizons New Horizons Wiki Page Launched January 20, 2006 Fly-by July 14, 2015 Long-Range Reconnaissance Imager (LORRI) Solar Wind At Pluto (SWAP) Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) Alice (UV imaging spectrometer) Ralph telescope Venetia Burney Student Dust Counter (VBSDC) Radio Science Experiment (REX) The Glitch July 4, 2015 the software went into safe mode Turned out to be a flaw in the timing of the commands in the fly-by prep software. Full functionality restored July 7 9 hour round trip radio delay Glaciers/Geology Bright heart shape observed on the side of the planet during approach is ice (Tombaugh Regio) Nitrogen ice flows like glaciers on Earth. Water ice is very brittle at surface conditions –390 F (–234 C) Active surface is exciting, it’s not a dead planet! Glacier Like Flows News Article from Science Atmosphere As UV light from the sun strikes the thin atmosphere, eventually making tholins that color the surface of the planet Some particles remain suspended, shouldn’t be over 30 km (20 mi) off the sfc. Particles were found to be up to 130 km (81 mi) above the surface Atmospheric pressure is dropping Charon Space.com Article Just as geologically exciting as Pluto Likely atmospheric in origin, but could still be geologic Low gravity of Pluto means it won’t hold onto its atmosphere…and Charon is near its same size, so it can pick up gravitationally what Pluto is putting down. Red coating could take less than a million years to form Near loss of the image Science Magazine Article Team opened the image file, but it was of Charon. They momentarily freaked wondering if the spacecraft wasn’t in the right position. Ended up that they were looking in the wrong directory on a FTP server. Future 2 months of particle and plasma instrument gathering Will choose between two Kuiper belt objects and head that way to meet in 2019 Data transmission home for about 16 months Getting the data back Tops out about 1 kilobit per second on the 70 m dishes of the deep space network Can double the rate using different polarization transmissions from the two amps “twittas”, but something else must be shut down to have enough power to run both at the same time Links Super Planet Crash APOD Pluto time tool shows you when your lighting matches that on Pluto. Tweet your photos to us and NASA! Article Announcing Haze and Ice Flows Fun Paper Friday This week’s fun paper sounds a little bit like Jurassic Park to us. What do you think? Blood vessels recovered from fossils. Schweitzer, Mary H., et al. “Soft-tissue vessels and cellular preservation in Tyrannosaurus rex.” Science 307.5717 (2005): 1952–1955. Contact us: Show - www.dontpanicgeocast.com - @dontpanicgeo - show@dontpanicgeocast.com John Leeman - www.johnrleeman.com - @geo_leeman Shannon Dulin - @ShannonDulin

Damanik, D (Rice University) Wednesday 24 June 2015, 10:00-11:00

Molchanov, S (University of North Carolina) Wednesday 27 May 2015, 14:00-15:00

Wang, Y (Nanjing University) Wednesday 08 April 2015, 15:00-16:00

Klein, S (Department of Mathematical Sciences, NTNU) Thursday 02 April 2015, 12:30-13:30

Klein, S (NTNU) Tuesday 07 April 2015, 15:00-15:25

Li, J (Institute of Atmospheric Physics, Chinese Academy of Sciences) Tuesday 19 November 2013, 11:00-12:00

Galatolo, S (Università di Pisa) Tuesday 29 October 2013, 09:35-10:10

Pianist Michael Lewin presents a recording of ghouls, ghosts and goblins with plenty of lead time for the Halloween season.

Speaker: Prof. P. van den Driessche Abstract: The World Health Organization estimates that there are 3 to 5 million cholera cases per year with 100 thousand deaths spread over 40 to 50 countries. For example, there has been a recent cholera outbreak in Haiti. Cholera is a bacterial disease caused by the bacterium Vibrio cholerae, which can be transmitted to humans directly by person to person contact or indirectly via the environment (mainly through contaminated water). To better understand the dynamics of cholera, ageneral ordinary differential equation compartmental model is formulated that incorporates these two transmission pathways as well as multiple infection stages and pathogen states. In the model analysis, some matrix theory is used to derive a basic reproduction number, and Lyapunov functions are used to show that this number gives a sharp threshold determining whether cholera dies out or becomes endemic. In the absence of recruitment and death, a final size equation or inequality is derived, and simulations illustrate how assumptions on cholera transmission affect the final size of the epidemic. Further models that incorporate temporary immunity and hyperinfectivity using distributed delays are formulated, and numerical simulations show that oscillatory solutions may occur for parameter values taken from cholera data in the literature.

Speaker: Prof. P. van den Driessche Abstract: The World Health Organization estimates that there are 3 to 5 million cholera cases per year with 100 thousand deaths spread over 40 to 50 countries. For example, there has been a recent cholera outbreak in Haiti. Cholera is a bacterial disease caused by the bacterium Vibrio cholerae, which can be transmitted to humans directly by person to person contact or indirectly via the environment (mainly through contaminated water). To better understand the dynamics of cholera, ageneral ordinary differential equation compartmental model is formulated that incorporates these two transmission pathways as well as multiple infection stages and pathogen states. In the model analysis, some matrix theory is used to derive a basic reproduction number, and Lyapunov functions are used to show that this number gives a sharp threshold determining whether cholera dies out or becomes endemic. In the absence of recruitment and death, a final size equation or inequality is derived, and simulations illustrate how assumptions on cholera transmission affect the final size of the epidemic. Further models that incorporate temporary immunity and hyperinfectivity using distributed delays are formulated, and numerical simulations show that oscillatory solutions may occur for parameter values taken from cholera data in the literature.

Speaker: Prof. P. Colaneri Abstract: In this paper the discretisation of switched and non-switched linear positive systems using Padé approximations is considered. Padé approximations to the matrix exponential are sometimes used by control engineers for discretising continuous time systems and for control system design. We observe that this method of approximation is not suited for the discretisation of positive dynamic systems, for two key reasons. First, certain types of Lyapunov stability are not, in general, preserved. Secondly, and more seriously, positivity need not be preserved, even when stability is. Finally we present an alternative approximation to the matrix exponential which preserves positivity, and linear and quadratic stability. This talk is based on joint work with Steve Kirkland, Annalisa Zappavigna & Robert Shorten

Speaker: Prof. A. Berman Abstract: In this paper a general notion of common diagonal Lyapunov matrix is formulated for a collection of n×n matrices A_1,...,A_s and polyhedral cones k_1,...,k_s in R^n. Necessary and sufficient conditions are derived for the existence of a common diagonal Lyapunov matrix in this setting. This talk is based on joint work with Christopher King & Robert Shorten.

Speaker: Prof. P. Colaneri Abstract: In this paper the discretisation of switched and non-switched linear positive systems using Padé approximations is considered. Padé approximations to the matrix exponential are sometimes used by control engineers for discretising continuous time systems and for control system design. We observe that this method of approximation is not suited for the discretisation of positive dynamic systems, for two key reasons. First, certain types of Lyapunov stability are not, in general, preserved. Secondly, and more seriously, positivity need not be preserved, even when stability is. Finally we present an alternative approximation to the matrix exponential which preserves positivity, and linear and quadratic stability. This talk is based on joint work with Steve Kirkland, Annalisa Zappavigna & Robert Shorten

Speaker: Prof. A. Berman Abstract: In this paper a general notion of common diagonal Lyapunov matrix is formulated for a collection of n×n matrices A_1,...,A_s and polyhedral cones k_1,...,k_s in R^n. Necessary and sufficient conditions are derived for the existence of a common diagonal Lyapunov matrix in this setting. This talk is based on joint work with Christopher King & Robert Shorten.

  More about Nocturnes Leon Bosch, Sung-Suk Kang "Nocturne" (mp3) from "Virtuoso Double Bass" (Meridian Records) Buy at iTunes Music Store More On This Album   The working relationship between Sung-Suk Kang and the distinguished double bass player Leon Bosch goes back to 1982, when both were students at the Royal Northern College of Music in Manchester, UK. Sung-Suk accompanied Leon during lessons and at scholarship auditions. 'At the end of our courses of study,' Leon remembers, 'the RNCM principal, Sir John Manduell, invited us to play two pieces together in one of the so-called principal's concerts. These were showcase events in which his ‘prize students’ were afforded a platform to perform in front of an audience of many distinguished invited guests, as well as the public. Sung-Suk and I performed two pieces by the great double bass player Bottesini, the Capriccio di Bravura and Fantasy Sonnambula. 'I'll remember that 1984 concert forever, for Sung-Suk’s magical playing throughout. There was one extended piano tutti in Sonnambula which was particular memorable for its unique delicacy and scintillating effervescence.' Sung-Suk picks up the story. 'After we left the RNCM, Leon and I lost contact with each other for twenty years. Then in the autumn of 2006, all of a sudden I received an SMS message from Leon on my mobile.....out of the blue. I called him back and discovered that at short notice he wanted me to play for him on a CD of pieces by Bottesini. After exchanging a few emails, I agreed.’ So what had inspired Leon to make the move? 'After Sung-Suk and I parted company back in 1984 I always thought of her whenever I played Sonnambula. I often wondered what had happened to her. I have a tape recording of that principal's concert and played it often over the years to reassure myself that it was indeed real and not just a grossly exaggerated and romanticised memory! 'Then when I was scheduled to record my first Bottesini disc, my pianist had to withdraw. After much thought, I resolved to try and find Sung-Suk, since she was the only person I felt I'd really be happy to work with. I put her name into Google and found her referred to on the website of the conductor, Nayden Todorov. With that lead, I traced her to Vienna.’ 'We began to rehearse as soon as I arrived in London!' Sung-Suk recalls. 'There wasn`t enough time to work on each piece in detail.... and we only had one and a half days to record all the repertoire for the CD. 'Playing with Leon wasn`t easy at first - he has a unique way of phrasing and his rubato is never predictable. And of course my ears had to concentrate so much on picking up the thick, deep lower register of the double bass sound. But during the recording sessions everything clicked and became completely natural. 'We tried to create a new atmosphere for each piece and then find the inspiration for a special interpretation at the end of the process. This was always different from what we'd prepared....music-making with Leon is always spontaneous! I love the full sound he makes, all the different colours he creates to express varied emotions in depth.’ As for Nocturne, it allows the piano to anticipate the main theme in the opening section but then gives it no share of the melodic line so expressively introduced and sustained by the double bass. It is, however, the piano which towards the end initiates the change from minor to major harmonies, just before double-bass harmonics magically project the melody into the soprano register. If Bottesini expected to be remembered by future generations he no doubt felt that it would be through his operas and sacred music. In fact, while they are forgotten, his posthumous reputation derives from an instrumental artistry which, though it died with him, survives in the hands of those few bassists who can do his compositions full justice.   Nikolai Lugansky "Nocturne, Op. 55 No. 1" (mp3) from "Chopin: Piano Sonata No. 3, Fantasie-impromptu, Prélude, Nocturne, et al." (Onyx Classics) Buy at iTunes Music Store More On This Album   Nikolai Lugansky's first recording for ONYX. The Daily Telegraph commenting on Lugansky, said 'He can thrill in taxing pianism through his iron will and fingers of steel, but there is an assuaging velvet quality to his tone, a natural feel for lyrical line' Gramophone praised his 'pianism of immense skill, fluency and innate musical quality' Nikolai Lugansky was born in Moscow in 1972. He studied at Moscow Central Music School (under Tatiana Kestner) and then at the Moscow Conservatory, where he was a pupil of Tatiana Nikolayeva, who described him as ‘the next one’ in a line of great Russian pianists. Following Nikolayeva’s untimely death in 1993, Lugansky continued his studies under Sergei Dorensky. A laureate of the International Bach Competition in Leipzig, the Rachmaninov Competition in Moscow and the International Tchaikovsky Competition in Moscow, Lugansky has a repertoire of over 50 concertos with orchestra as well as a wide range of solo and chamber works. He has worked with many distinguished orchestras and conductors including Christoph Eschenbach, Vladimir Fedoseyev, Valery Gergiev, Neeme Järvi, Raymond Leppard, Yoel Levi, Mikhail Pletnev, Gennady Rozhdestvensky, Vladimir Spivakov, Evgeny Svetlanov, Yuri Temirkanov, Kurt Masur, Riccardo Chailly and others. His chamber music partners have included Vadim Repin, Alexander Kniazev, Joshua Bell, Yuri Bashmet, Mischa Maisky, Leonidas Kavakos and Anna Netrebko among others. Lugansky has recorded 23 CDs. His solo recordings on Warner Classics — Chopin Études, Rachmaninov Préludes and Moments musicaux and Chopin Préludes — were each awarded a Diapason d’Or. His PentaTone Classics SACD of Tchaikovsky’s Piano Concerto no.1, with the Russian National Orchestra under Kent Nagano, was cited as ‘Editor’s Choice’ in Gramophone. His Prokofiev CD was one of the ‘CDs of the Year’ (2004) featured in The Daily Telegraph. Lugansky’s recordings of the complete piano concertos of Rachmaninov, with the City of Birmingham Symphony Orchestra under Sakari Oramo, received Choc du Monde de la Musique, Preis der deutschen Schallplattenkritik and the 2005 ECHO Klassik Award. His last recording (Chopin’s and Rachmaninov’s cello sonatas) with the cellist Alexander Kniazev won the 2007 ECHO Klassik Award. As well as performing and recording, Lugansky teaches at the Moscow Conservatory as an assistant of Prof. Sergei Dorensky.   Anthony Goldstone "Nocturne in D-Flat Major, Op. 8" (mp3) from "Russian Piano Music, Vol. 4: Sergei Lyapunov" (Divine Art) Buy at iTunes Music Store Buy at Amazon MP3 More On This Album Now almost forgotten in the West, Lyapunov was one of the truly great composers of the Romantic era in the late 19th and early 20th centuries. His Sonata is a phenomenal work and his mastery of pianistic composition is also finely demonstrated by the other works on this album masterfully interpreted by Anthony Goldstone. Anyone who loves Chopin or Liszt should get to know this music.   Fuzjko Hemming "Nocturne No. 20 In C-Sharp Minor" (mp3) from "Fuzjko Hemming - Collector's Edition" (Fuzjko Label) Buy at iTunes Music Store Stream from Rhapsody Buy at Amazon MP3 More On This Album Having wowed much of the Eastern Hemisphere for years, classical pianist Fuzjko Hemming is preparing for her introduction to the United States. Having been born into humble circumstances, child of a Japanese mother and Swedish father, she has felt rootless, too Asian in appearance for Sweden, and in Japan constricted by the society's stratified and class-oriented way of life. Then, as she was starting to gain traction as a professional musician, her promising career was cut short. - Fuzjko lost all hearing in her left ear after battling a serious cold. At 16, she already lost her hearing in her right ear due to illness. Completely deaf for 2 years, she eventually had 40% of her hearing restored in her left ear. After living in poverty in Europe for many years before returning to Japan and gaining acclaim for her music - critics hailed her as being "born to play Chopin and Liszt " In 1999, Japan's NHK Television aired a documentary of her life and she released her debut album, La Campanella, which sold more than two million copies, a rare accomplishment for any classical artist She also has won an unprecedented four Classical Album of the Year Awards at the Japan Gold Disc Awards, another extraordinary achievement for any artist, let alone a classical artist She remains the only four-time Gold Disc Award winner. Since that time she has recorded numerous successful albums - invigorating collections of classical interpretations, five of which are being released for the first time in the U.S. on her label Domo Records: Echoes of Eternity, La Campanella, Liszt: Piano Concerto No. 1, Nocturnes of Melancholy, Live at Carnegie Hall. On the new album, Fuzjko, the artist performs largely romantic repertoire ranging from Beethoven's "The Tempest" sonata to works by Chopin, Liszt, Scarlatti and Debussy. In each piece, whether performing Chopin's Nocturnes or Liszt's bravura pieces "La Campanella" and "Grand Etudes D'Apres Paganini No. 6", Fuzjko infuses poetry to these timeless compositions, and always in her own eminently attractive style. The warmth of Fuzjko's sound can also be heard in Scarlatti's Sonata K.162 and Debussy's "Claire De Lune". Although much of the repertoire is familiar, Fuzjko also dips into lesser known works like Liszt's transcription of Schumann's "Fruhlinghsnacht", and Chopin's "Trois Nouvelles Etudes No.3, and always played with her celebrated musicality much in evidence. The celebrated virtuoso blends the classicality of her influences such as Franz Liszt, Frédéric Chopin with the sophisticated approach of her mentors (Leonard Bernstein, Herbert von Karajan) to create an emotional delivery of exquisite craftsmanship. She's been known to bring some fans to tears with her moving immersion in her music. With her strikingly unorthodox playing style and intricate ethnic roots, it's evident that Fuzjko's true home is at the piano, where she reveals herself as a true artist of the world.   Carly Comando "Bear" (mp3) from "One Take" (Deep Elm) Buy at iTunes Music Store Buy at Amazon MP3 More On This Album   Chilling. Stirring. Powerful. Contemplative. These are some of the words most frequently used to describe the achingly beautiful piano instrumentals of Carly Comando. Her debut album "One Take" features ten delicately woven songs (including her single "Everday") that are the direct emotional output of her innermost thoughts. "The album means the world to me. It's complete, in-the-moment sincerity translated into moody solo piano music. I used an improv technique, recording in just one take, so I could capture the essence of pure emotion" says Carly. From the rises and falls to the shrinks and swells, these songs will leave an indellible impression on your mind. It's music that stays with you forever. "One Take" was recorded in Carly's home studio in Brooklyn, NY. Mastered by Phil Douglas (Latterman, Small Arms Dealer, Iron Chic). The album includes the "Everyday" which was originally released in December 2006. Deep Elm Records is simultaneously releasing an EP titled "Cordelia" featuring four additional piano instrumentals. Carly also plays keyboards / sings in the band Slingshot Dakota and composes custom works upon request. And yes, that was the name given to her at birth. "This is music that changes lives, opens minds, broadens horizons. Carly is an amazing pianist." - ANA "Beautiful and soothing, she will evoke emotion and ease any scattered mind. A talented composer." - SweetieJo "Emotional and inspiring, it grabs your soul and moves you. Highly recommended." - The Rez

Speaker: Prof. M. E. Valcher Abstract: Abstract: Positive switched systems typically arise to cope with two distinct modeling needs. On the one hand, switching among different models mathematically formalizes the fact that the system laws change under different operating conditions.On the other hand, the variables to be modeled may be quantities that have no meaning unless positive (temperatures, pressures,population levels, ...). In this talk we consider the class of discrete-time positive switched systems, described, at each time t, by the first-order difference equation: x(t+1) = A_{sigma(t)} x(t), where sigma is a switching sequence, taking values in the finite set {1,2}, and for each index i, A_i is an n x n positive matrix. Assuming that both A_1 and A_2 are not Schur matrices, we focus on the stabilizability of the system, namely on the possibility of finding switching strategies that drive to zero the state evolution corresponding to every positive initial state x(0). To this end, we resort to state feedback switching laws, whose value at the time t depends on the value of some Lyapunov function in x(t). We first explore quadratic positive definite functions, by extending a technique described by De Carlo et al.. Later, by taking advantage of the system positivity, we show that other classes of Lyapunov functions, such as linear copositive and quadratic copositive ones, may be used to design state-dependent stabilizing switching laws, and some of them may be designed under weaker conditions on the pair of matrices (A_1,A_2) with respect to those required for quadratic stabilizability. Some comparisons between the performances of the switching strategies are given.

Speaker: Prof. M. E. Valcher Abstract: Abstract: Positive switched systems typically arise to cope with two distinct modeling needs. On the one hand, switching among different models mathematically formalizes the fact that the system laws change under different operating conditions.On the other hand, the variables to be modeled may be quantities that have no meaning unless positive (temperatures, pressures,population levels, ...). In this talk we consider the class of discrete-time positive switched systems, described, at each time t, by the first-order difference equation: x(t+1) = A_{sigma(t)} x(t), where sigma is a switching sequence, taking values in the finite set {1,2}, and for each index i, A_i is an n x n positive matrix. Assuming that both A_1 and A_2 are not Schur matrices, we focus on the stabilizability of the system, namely on the possibility of finding switching strategies that drive to zero the state evolution corresponding to every positive initial state x(0). To this end, we resort to state feedback switching laws, whose value at the time t depends on the value of some Lyapunov function in x(t). We first explore quadratic positive definite functions, by extending a technique described by De Carlo et al.. Later, by taking advantage of the system positivity, we show that other classes of Lyapunov functions, such as linear copositive and quadratic copositive ones, may be used to design state-dependent stabilizing switching laws, and some of them may be designed under weaker conditions on the pair of matrices (A_1,A_2) with respect to those required for quadratic stabilizability. Some comparisons between the performances of the switching strategies are given.

Speaker: Prof. E.C. Velasco Abstract: Volterra integral and difference equations may be used to model the dynamics of physical systems (viscoelasticity, motion of bodies with reference to hereditary) and biological systems (populations dynamics, biomechanics). In this talk we discuss about asymptotic properties of solutions of both, Volterra integral and Volterra difference equations. For the Volterra difference equations, we derive stability conditions based on the direct Lyapunov method and present some examples to illustrate them.

Speaker: Prof. E.C. Velasco Abstract: Volterra integral and difference equations may be used to model the dynamics of physical systems (viscoelasticity, motion of bodies with reference to hereditary) and biological systems (populations dynamics, biomechanics). In this talk we discuss about asymptotic properties of solutions of both, Volterra integral and Volterra difference equations. For the Volterra difference equations, we derive stability conditions based on the direct Lyapunov method and present some examples to illustrate them.

Garage sales. Commemorative plates. Good/no-good. Flirting. Lyapunov stability. Gravity wells.

Sadel, C (Erlangen) Wednesday 23 July 2008, 16:00-16:45

We consider a directed polymer on the unit circle, with a continuous direction (time) parameter , defined as a simple random walk subjected via a Gibbs measure to a Hamiltonian whose increments in time have either long memory () or semi-long memory (), and which also depends on a space parameter (position/state of the polymer). is interpreted as the Hurst parameter of an infinite-dimensional fractional Brownian motion. The partition function of this polymer is linked to stochastic PDEs via a long-memory parabolic Anderson model. We present a summary of the new techniques which are required to prove that, in the semi-long memory case, converges to a positive finite non-random constant, and in the long-memory case, this limit is blows up, while the correct exponential growth function in that case is sandwiched between and . These tools include an almost sub-additivity concept, usage of Malliavin derivatives for concentration estimates, and an adaptation to the long-memory case of some arguments from the case (no memory), which require a detailed study of the interaction between the long memory, the spatial covariance, and the simple random walk. This talk describes joint work with Dr. Tao Zhang. Frederi VIENS. Purdue University. Bande son disponible au format mp3 Durée : 46 mn

Townsend, James - From Basics to Contemporary Paradigms: Chaos - Chaos theory has seemed to take the world by storm. There has been much chaos in the descriptions of, and prognostications for, this admittedly fascinating topic. What is chaos and can it be described in laypersons' terms without lying too much? I will offer a simple tour of of the main concepts, which can be understood with only a modicum of quantitative background (although, of course, serious research would request much deeper training). Some of the concepts we will touch upon are: 1. A rigorous (comprehensible) definition and its main ideas including "sort of' periodicity and the butterfly effect. 2. Its place as part of dynamic systems theory. 3. The connections to fractals and "weird" fractal dimensions. 4. Lyapunov exponents. 5. Strange attractors. 6. Randomness in deterministic systems. I will also hazard some speculation as to chaos theory's applicability to psychology and biology, with some reference to its usage in philosophy, physics and chemistry.