2026-05-21T15:57:52Z https://yabu.me Gustavo Rodríguez Liñán https://yabu.me/npub1v04yt0vt2hs3v9f98gwu5c3n4gluh6kl0znnstm9qpytpmfse4rsc8k7gj https://static.mstdn.science/accounts/avatars/109/501/930/907/130/467/original/f0a68b0989c9a8bf.jpg https://static.mstdn.science/accounts/avatars/109/501/930/907/130/467/original/f0a68b0989c9a8bf.jpg https://yabu.me/nevent1qqsw7xf0g7cnqay9p0jhfjfm7agwaf9qxxwryhmn9a0l4tuy7zmcnhgzyp3753da3d27z9s4y5apmjnzxw4rljl2mau2wwp0v5qy3v8dxrx5wkvgygz I think everybody should know what it&#39;s currently going on in #Mexico.<br/><br/>This Sunday morning, federal forces have killed drug cartel boss Nemesio Oseguera a.k.a. &#34;El Mencho&#34;. Federal authorities state that this has been done in cooperation with USA agencies.<br/><br/>As a result, violence has erupted in several parts of the country, in what seem retaliation by organized crime. This includes setting fire public transportation and particular vehicles as well as convenience stores and blockade of highways.<br/> <img src="https://static.mstdn.science/media_attachments/files/116/116/940/693/489/974/original/e4e68fb4d857f197.png"> <br/> 2026-02-22T23:46:15Z https://yabu.me/nevent1qqsw7ytslqmv9qngjfcf26fx572hdvzwfml4h7x7xqeedj8ezshkv7qzyp3753da3d27z9s4y5apmjnzxw4rljl2mau2wwp0v5qy3v8dxrx5wt28rnm In reply to <a href='/nevent1qqst4su79zm8ygudhyj4xmu2qgu3wex7ghw489ldrxv5lux27srqrsc4xwvzc'>nevent1q…wvzc</a><br/>_________________________<br/><br/>OK. According to Wikipedia, the equation for a Bernoulli&#39;s lemniscate in the general case is<br/><br/>(𝑥²+𝑦²)² = a²(𝑥²−𝑦²).<br/><br/>So, is the parameter a the analogue of a radius? In other words, is the perimeter of a non-unit lemniscate equal to 2ϖa? 2024-12-25T22:34:42Z https://yabu.me/nevent1qqswujknv69j3f7qlte8scq5hyclspvye0358nssnycsj0zed5er0sczyp3753da3d27z9s4y5apmjnzxw4rljl2mau2wwp0v5qy3v8dxrx5w2j008j In reply to <a href='/nevent1qqs05wu5mdt0aphjg9jg5k53xedrex484dxu67yknkcyfdal0mxzcmcx2mkwn'>nevent1q…mkwn</a><br/>_________________________<br/><br/>I really don&#39;t understand this: &#34;Just as the perimeter of a circle is 2π, the perimeter of this curve is 2ϖ&#34;.<br/><br/>Well, technically, the perimeter of a circle is 2π time its radius, so I expect the lemniscate&#39;s perimeter is 2ϖ times &#34;some radius&#34;. What is it? On a circle it&#39;s obvious but not on an 8-shaped curve. 2024-12-25T19:50:22Z https://yabu.me/nevent1qqsdeq498l6mnvjuqjv83plfv749w5k8ry24jfdaewhffppsvqakaeszyp3753da3d27z9s4y5apmjnzxw4rljl2mau2wwp0v5qy3v8dxrx5wsnrff0 According to this paper, a lot of hot spots are emerging all over the world: zones suffering persistent heatwaves that cannot be predicted by current climate models. #GlobalWarming #ClimateChange #HeatWave #AtmosphericScience<br/><br/>&#34;Global emergence of regional heatwave hotspots outpaces climate model simulations&#34;<br/><br/><a href="https://www.pnas.org/doi/full/10.1073/pnas.2411258121">https://www.pnas.org/doi/full/10.1073/pnas.2411258121</a> 2024-11-27T20:12:40Z https://yabu.me/nevent1qqspg2chds9e6ytph3hlqpz4mezuks73mj6ldff38uwharhffeyahgczyp3753da3d27z9s4y5apmjnzxw4rljl2mau2wwp0v5qy3v8dxrx5wv0e3nd I don&#39;t want to be pessimistic, but this looks like it&#39;s going to be #HurricaneOtis 2.0.<br/>#TropicalStorm #Hurricane #TropicalStormJohn #HurricaneJohn #Oaxaca<br/> <img src="https://static.mstdn.science/media_attachments/files/113/188/649/554/076/577/original/853f573becf6bfe6.png"> <br/> 2024-09-23T20:05:32Z