Filsafat adalah sebuah hal yang penting dalam hidup kita. Tanpa filsafat kita tidak akan mengerti mengenai ilmu pengetahuan. Bisa dikatakan jika filasafat ini merupakan induk dari ilmu pengetahuan. Ada beberapa jenis filsafat, salah satunya adalah filsafat sejarah. G.W.F. Hegel adalah seorang pemikir yang berasal dari Jerman dan seorang yang dijuluki sebagai bapak filsafat kritis, dimana G.W.F. Hegel ini juga membahas filsafat sejarah dan filsafat sejarah ini sendiri adalah pusat dari filsafat Hegel. Kata kunci : Filsafat, G.W.F. Hegel, Filsafat sejarah Abstrac: philosophy is an important thing in our life. Without philosophy we would not understand science. It could be said that this philosophy is the mother of sience. There are several types of philosophy, one of which is the philosophy of history. G.W.F. Hegel is a thinker from Germany and someone who is called the father of critical philosophy, where Hegel also discusses the philosophy of history and this philosophy of history it self is the center of hegel's philosophy.

Draft readings for interdisciplinary seminar food studies. This is mostly an ordering exercise for me to think about how I would prioritize topics. The actual class is taught in Chinese and will probably focus more on China content.

Absorbing sound almost completely at specific frequencies with conventional acoustic materials whose thickness is at least 60 times smaller than the wavelength is a challenge, particularly at low frequencies. Fort this purpose, acoustic metamaterials are of a great interest. Here, the metamaterial is called multi-pancake cavities. It is composed of a main pore with a repetition of thin annular cavities (pancake cavities). Previous research has shown that this repetition increases the effective compressibility of the main pore. This increase makes it possible to decrease the effective sound speed in the material and, consequently, the main pore resonance frequencies. At these resonances, the metamaterial presents absorption peaks, the first one can have a wavelength to material thickness ratio of more than 60 (subwavelength material). To complete the analysis and prediction of absorption peaks (especially secondary peaks) of these metamaterials, it is proposed to adapt a conventional...