Abstrak
 
 PT. Putra Perkasa Abadi (PPA) merupakan kontraktor pertambangan dengan spesialisasi alat berat penyedia jasa persewaan peralatan, pemindahan tanah & pertambangan.Terdapat beberapa permasalahan yang sering terjadi dalam penambangan antara lain kerusakan prematur pada vessel, durasi dumping lama, carryback material, dan high risk aktivitas dumping. Melekatnya material di ...

Human immunodeficiency virus (HIV), the virus that causes AIDS, did not originate in humans. Instead, the most common variant, HIV1, is thought to have originated as a simian immunodeficiency virus (SIV) in apes and to have jumped the species barrier from apes to humans sometime in the first half of the 20th century. Similarly, HIV2—a related but less virulent virus—arrived in humans after jump...

We show that under a new U(1) gauge symmetry, which is non-anomalous in the presence of one “right-handed neutrino” per generation and consistent with the standard model Yukawa couplings, the most general fermion charges are determined in terms of four rational parameters. This generalization of the B − L symmetry with generation-dependent lepton charges leads to neutrino masses induced by oper...

conclusions switching ams off may increase biventricular pacing in some patients. case presentation in this case series, we present a combination of far field sensing and automatic mode switching (ams) in six patients. it is found that this combination causes ventricular sensing (vs) episodes with wide qrs and no synchronization. we turn off the ams and alleviate the problem. introduction cardi...

Abstract It is well-known that one of the reasons for reducing head a centrifugal pump, when trimming its impeller, reduction slip factor. There are various methods used to determine it, but there lack information on whether they applicable in case pump with trimmed impeller operates. In present work, comparative experimental study concerning applicability some factor, two pumps different speci...

We consider the algorithmic problem of generating each subset of [n] := {1, 2, . . . , n} whose size is in some interval [k, l], 0 ≤ k ≤ l ≤ n, exactly once (cyclically) by repeatedly adding or removing a single element, or by exchanging a single element. For k = 0 and l = n this is the classical problem of generating all 2 subsets of [n] by element additions/removals, and for k = l this is the...