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This thesis studies the microscopic mechanisms for noncollinear spin ordering in magnetic materials. I discuss interactions between spins that can give rise to noncollinear and multiply-periodic states, and the interplay between different interactions provides an additional degree of complexity. Our results on the Double Exchange model show that a non-collinear spiral ordering of spins can be energetically more favorable than the collinear ferromagnetic state, even in the limit of strong Hund's Rule coupling. We obtained a rich phase diagram for the triangular lattice with many competing magnetic phases. Our study done in collaboration with A. Aqeel and co-workers establishes all-electrical Spin Hall Magnetroresistance measurements as a probe for detection of complex non-collinear orders, such as the skyrmion lattice. In addition, we introduce a new term in the transverse Spin Hall Magnetroresistance that is nonzero only for noncollinear magnets. Our study establishes the frustrated chiral magnet Pb$_2$MnO$_4$ as a new model system for the realisation of complex non-collinear magnetic ordering and topological defects. Our study of the collinear antiferromagnet CaFe$_2$O$_4$ shows that magnetic anisotropy structure is crucial for understanding of the time-resolved THz spectroscopy measurements of T. Mai and co-workers. The main goal of this research is to gain a better fundamental understanding of the properties of non-collinear magnets. Magnetic orders of particular interest to this thesis are topological magnetic structures, such as the compact magnetic vortices known as skyrmions. The results can be used to study and design magnetic materials of special relevance to technological applications, such as smaller and more efficient memory devices. This thesis studies the microscopic mechanisms for noncollinear spin ordering in magnetic materials. I discuss interactions between spins that can give rise to noncolli

The health of pregnant women will determine for health status of the baby. This is also a main concern for the government. Pregnant women bring prospective future generations to the nation who will productively contribute greatly to the progress of the nation. The importance of maternal health can be seen from the government’s policy that the reduction of the Maternal Mortality Rate (MMR) is one of the SDG’s 2030 targets and an indicator of the success of national development. Pregnant women are a vulnerable group, especially in pandemic situations and conditions. Various efforts were made to maintain the health of mothers and babies during pregnancy until delivery. Gowa Regency is a district with the second highest number of Covid case in South Sulawesi. Therefore, it became the basis for implementation of community service in the working area of ​​the Bajeng Public Health Center, Gowa Regency. The method used is to provide health education in the form of a gallery walk with the aim of increasing the knowledge of pregnant women in order to maintain their health. Various important themes in this counseling include: anemia in pregnant women, the risk of 4T in pregnant women, recognizing the symptoms and danger signs in pregnancy, stress management for pregnant women, and nutrition needed by pregnant women and continuing to carry out pregnancy check-up during the pandemic period. During the activities, pregnant women were enthusiastically paying attention to each material provided and actively discussing. At the end of the counseling, we immediately evaluated the knowledge of pregnant women regarding in the materials that had been given. They were very happy with these activities, and looking forward to such activities next time. Therefore, we suggest to related parties, namely the head of the public health center and health workers, to continue to carry out health education regularly and to reactivate the integrated healthcare center for pregnant women during