Michele Martone

Many science and engineering models reduce to problems involving huge sparse matrices -- matrices where most of the values are zeroes. Such computations are resource-intensive (time, memory, energy), and much research was devoted into data structures ("formats") and algorithms leading to fast sparse matrix operations. Yet, most such formats are highly specialized and seldom make it into a solid software package apt for general use. The RSB (Recursive Sparse Blocks) data structure is a format that addresses performance concerns for current shared-memory multicore CPUs, while also avoiding dead ends in terms of usability.

The LIBRSB library implements RSB with all the necessary operations to manipulate sparse matrices in most computations, in the most popular programming languages, and on many hardware platforms.

This talk will give an overview of the concepts behind LIBRSB and its main usage modes.

Intended audience: Developers of Linear Systems Solvers based on Iterative Methods, or General Computing Packages.
Expected prior knowledge: Familiarity in any of C, C++, Fortran, Python, GNU Octave.

FIM (Fbi IMproved) is a `swiss army-knife' image viewer. You can use it under the Linux Framebuffer, under X, or in text terminals (ASCII Art), with a consistent interface and with many powerful features. Whether for occasional image viewing, creation of tagged pictures collections, tailoring short and specialized scripts or custom actions, or viewing graphics on a Raspberry Pi, there are many situations where the unique features of FIM make the difference. FIM grew out a fork of the FBI image viewer, and its name is inspired by the VIM text editor. This talk will tour peculiar use cases where FIM shines.

FIM (Fbi IMproved) is a powerful image viewer with a minimalistic interface. FIM follows the spirit of the VIM (Vi IMproved) text editor: it is specialized in its task and powered by an own domain-specific language (DSL) which allows powerful custom features. FIM happens to be mostly appreciated by users of: [neo]mutt, emacs/mu4e, vim, command-line-interface and non-standard Linux Framebuffer-enabled hardware. The talk will introduce FIM's unique features from the perspective of its DSL, with word on the future. Feedback is welcome.

https://www.nongnu.org/fbi-improved/