Quantum weirdness Now let’s consider whether God can be in more than one place at the same time. Much of the science and technology we use in space science is based on the counter-intuitive theory of the tiny world of atoms and particles known as quantum mechanics. The theory enables something called quantum entanglement: spookily connected particles. If two particles are entangled, you automatically manipulate its partner when you manipulate it, even if they are very far apart and without the two interacting. There are better descriptions of entanglement than the one I give here – but this is simple enough that I can follow it. Imagine a particle that decays into two sub-particles, A and B. The properties of the sub-particles must add up to the properties of the original particle – this is the principle of conservation. For example, all particles have a quantum property called “spin” – roughly, they move as if they were tiny compass needles. If the original particle has a “spin”...
Two hundred years ago, 20-year-old Mary Shelley won a bet with her future husband Percy Shelley and his friend Lord Byron to write a horror story: she created Frankenstein, the story of a Genevan scientist who created artificial life – and regretted it for the rest of his days. Shelley created more than she knew: her story is not just considered to be the first science-fiction novel, but has spawned an army of monstrous descendants. What is it that continues to draw writers, particularly those who don’t usually write science fiction, to create artificial humans? How do writers use these characters to tell us about ourselves? What does the 21st-Century Frankenstein’s monster look like? It’s worth reminding ourselves first what Frankenstein – slandered by Hollywood into a monster-mania freak show – is actually about. (One definition of a classic, after all, is a book that still has the power to surprise you.) In the novel, inquisitive student Victor Frankenstein gives life to “the ...
Pedoman tata laksana hipertensi dipublikasikan oleh European Society of Hypertension (ESH) pada tahun 2023. Pedoman ini membahas mengenai rekomendasi cara pengukuran tekanan darah, penilaian risiko kardiovaskular, intervensi gaya hidup yang optimal, dan manajemen farmakoterapi. ESH merekomendasikan ambang batas >140/90 mm Hg untuk diagnosis hipertensi. Selain itu, pedoman ESH merekomendasikan target pengobatan tekanan darah yang dibedakan berdasarkan usia, yang mana ambang batas pengobatan tekanan darah dibuat lebih tinggi untuk lansia. Untuk pasien dalam kelompok usia ini dengan hipertensi sistolik terisolasi dan untuk orang dewasa ≥80 tahun, ambang batasnya ditargetkan antara 140-150 mm Hg. Penentuan Tingkat Bukti Pedoman ESH ini disusun oleh 59 pakar multidisiplin yang meninjau bukti ilmiah pada setiap topik hipertensi. Setiap rekomendasi diberi Class of Recommendation (CoR) untuk menunjukkan kekuatan rekomendasi (I bermanfaat, II opsional, III tidak...
Comments
Post a Comment