In the definition of a crossed module $(T,G,rho)$, the actions of the group $T$ and $G$ on themselves are given by conjugation. In this paper, we consider these actions to be arbitrary and thus generalize the concept of ordinary crossed module. Therefore, we get the category ${bf GCM}$, of all generalized crossed modules and generalized crossed module morphisms between them, and investigate som...

 Let $R$ be a ring‎, ‎and let $n‎, ‎d$ be non-negative integers‎. ‎A right $R$-module $M$ is called $(n‎, ‎d)$-projective if $Ext^{d+1}_R(M‎, ‎A)=0$ for every $n$-copresented right $R$-module $A$‎. ‎$R$ is called right $n$-cocoherent if every $n$-copresented right $R$-module is $(n+1)$-coprese-nted‎, ‎it is called a right co-$(n,d)$-ring if every right $R$-module is $(n‎, ‎d)$-projective‎. ‎$R$...

. Demam berdarah dengue(DBD) adalah penyakit infeksi virus akut yang disebabkan oleh dengue. Provinsi Sumatera Barat merupakan salah satu provinsi di Indonesia memiliki angka penderita DBD cukup tinggi. Penelitian ini bertujuan untuk mengelompokkan kabupaten/kota berdasarkan faktor terkait kejadian yakni banjir, penampungan air, fasilitas dan tenaga kesehatan penduduk miskin. Metode digunakan d...

Abstract Physical models of anatomical structures can be made using Additive Manufacturing (AM) or Subtractive (SM). The advantage subtractive techniques over additive ones is the possibility maintaining homogeneity and consistency processed material, which extremely important in case medical devices. Currently, a geometrically complex model even on simple, 3-axis CNC machine tool. However, oft...