Today's energy consumption is one of the most important causes of pollution around the world. Considering the building sector consumes the most energy, it should be seriously considered. In order to provide thermal comfort inside a building, energy is consumed, which can be managed using tools such as louvers that allow solar radiation to pass through the windows while reducing the amount of consumed energy. The goal of this paper is to find the optimal features for shading device of fixed louvers for the east, west, and south facades of the office building at Hakim Sabzevari University in terms of thermal efficiency using parametric analysis. For one year, three rooms on three floors of this building with window louvers at different depths, angles, and distances were thermally simulated with EnergyPlus software and the HoneyBee plugin in addition to the Galapagos plugin for optimization. Based on the optimized samples, it is possible to reduce the thermal energy consumption by 32.34%, 23.71%, and 30.2%, respectively using the ideal louvers on the east, south, and west facades. In terms of thermal efficiency, the distance between the blinds on the south facade and the angle between them on the east and west facades of a window louver are the most significant factors.

The electronic structure and magnetism of new Heusler alloys of CsBaX 2 (X = C, N, and O) were investigated within density functional theory (DFT) using the selfconsistent full-potential linearized augmented plane wave (FPLAPW) method. The CsBaC 2 in the AlCu 2 Mn-type was a half-metallic ferromagnet while it was a nonmagnetic metal in CuHg 2 Ti-type structure. CsBaN 2 and CsBaO 2 compounds in both structures were half-metallic ferromagnets. The majority band gap for CsBaC 2 in the AlCu 2 Mntype was obtained equal to 1.67 eV and for CsBaN 2 and CsBaO 2 compounds in the AlCu 2 Mn-type (CuHg 2 Ti-type) structure were calculated equal to 2.34 (2.29) eV and 3.53 (2.76) eV, respectively. The origin of half-metallicity was also studied using the band structure calculations and density of states (DOSs). The total magnetic moments of CsBaC 2 , CsBaN 2 , and CsBaO 2 compounds were, respectively, obtained as 5μ B , 3μ B , and 1μ B per formula unit at the equilibrium lattice parameter, which were in agreement with Slater-Pauling rule (M tot = 12-Z tot ). The CsBaX 2 (X = C, N, and O) compounds kept their half-metallic characteristic in a wide range of lattice constants in comparison with Heusler alloys including transition metals, which makes them promising and attractive materials in spintronic field.