Sewage contamination of our ground and surface waters is a major public health concern. Current indicator bacteria, such as Escherichia coli and enterococci, can naturalize in subtropical and tropical environments, ergo better indicator organisms are needed. Furthermore, current indicator bacteria do not discriminate between contamination sources, and hence the application of microbial source t...

We survey certain accessible aspects of Grothendieck’s theory of motives in arithmetic algebraic geometry for mathematical physicists, focussing on areas that have recently found applications in quantum field theory. An appendix (by Matilde Marcolli) sketches further connections between motivic theory and theoretical physics. post hoc, ergo ante hoc – Umberto Eco, Interpretation and overinterpr...

The SMT-LIB standard defines a formal semantics for a theory of floating-point (FP) arithmetic (FPA). This formalization reduces FP operations to reals by means of a rounding operator, as done in the IEEE-754 standard. Closely following this description, we propose a three-tier strategy to reason about FPA in SMT solvers. The first layer is a purely axiomatic implementation of the automatable s...

This article details the formal verification of a 2-line C program that computes the number of solutions to the n-queens problem. The formal proof of (an abstraction of) the C code is performed using the Why3 tool to generate the verification conditions and several provers (Alt-Ergo, CVC3, Coq) to discharge them. The main purpose of this article is to illustrate the use of Why3 in verifying an ...

Masa pandemi COVID-19 menyebabkan kegiatan Posyandu lansia berhenti sementara sehingga hanya berdiam diri di rumah tanpa melakukan aktivitas tambahan. Selama ini, meliputi timbang berat badan dan pemberian obat oleh Dokter, belum adanya edukasi mengenai Latihan fisik pada karena ketidaktahuan Kader. Kegiatan ini bertujuan untuk meningkatkan peran Kader dalam menjaga kesehatan lansia. Pelaksanaa...