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"ABSTRAKKami mengkaji paduan Half-Heusler NiMnSb dalam struktur kristal C1b dari aspek teori kemagnetannya. Kami melakukan perhitungan numerik pada sistem ini dengan metode Hamiltonian suku kinetik pendekatan tight-binding dan interaksi berbasis mean-field theory. Dari hasil perhitungan, sistem paduan NiMnSb menunjukkan karakter metal pada saat U J < 2.5 eV dan karakter semi metal pada U J ge; 2.5 eV. Menariknya, pada U=2.5 eV dan J=0.9 eV diperoleh moment magnet asymp; yang mana ini sesuai dengan prediksi Slater-Pauling.Kata kunci : Paduan Half-Heusler, Moment Magnet, Tight-Binding

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ABSTRACTWe study a Half Heusler alloy of NiMnSb in C1b crystal structure for magnetic theoretical aspect. We have done numerical calculation of the NiMnSb compound system using the model Hamiltonian kinetic term within tight binding approximation and the interaction based on mean field theory. From computational output, the NiMnSb compound system exhibit metal phase by the time U J 2.5 eV and half metal phase in U J ge 2.5 eV. Interestingly, the moment magnet results of U 2.5 eV J 0.9 eV is asymp which is agree with Slater Pauling prediction.Key words Half Heusler Alloy, Magnetic Moment, Tight Binding"

"This book introduces readers to the lattice Boltzmann method (LBM) for solving transport phenomena-flow, heat and mass transfer-in a systematic way. Providing explanatory computer codes throughout the book, the author guides readers through many practical examples, such as:- flow in isothermal and non-isothermal lid-driven cavities;- flow over obstacles;- forced flow through a heated channel;- conjugate forced convection; and- natural convection.Diffusion and advection-diffusion equations are discussed, together with applications and examples, and complete computer codes accompany the sections on single and multi-relaxation-time methods. The codes are written in MatLab. However, the codes are written in a way that can be easily converted to other languages, such as FORTRANm Python, Julia, etc. The codes can also be extended with little effort to multi-phase and multi-physics, provided the physics of the respective problem are known."