Search Results for "coordinates"

"GEnerator of atomic COORdinates for armchair nanotubes with specific bond lengths and angles. (gecoor) Gustavo Domínguez Rodríguez, Gabriel Iván Canto Santana, Jorge Alejandro Tapia Gonzalez, Cesar Alberto Cab Cauich A problem that arises when applying specific strain fields to nanostructures is knowing the atomic coordinate positions that produce the required structural parameters, such as bond lengths and angles.

...The developed tools include: 1) generator of molecule-water complexes with graphical user interface (GUI), 2) semi-automatic frequency analysis using symbolic potential energy distribution matrix and comparison of optimized internal coordinates, 3) GUI for charge fitting with three modes: manual, Monte-Carlo sampling or brute force, and 4) GUI for dihedral terms fitting. The usage of these tools decreases the labor effort, lowers manual input errors and reduces the time needed for accurate MM parameterization efforts.

A Windows software for generating structures of nanotubes and some fullerenes. You can generate any kind of nanotubes (n,m) with chirality indices n and m ranging from 0 to 60, and the number of repetitive unit cells up to 50. You can also generate some typical fullerene cages from C20 up to C320.

Vibeplot presents a new and attractive way to visualize vibrational analysis from density functional calculations (DFT). It is especially targeted at the chemists. The interface can either be scripted or used interactively with QVibeplot.

...The approach is general and the definition of PIV only requires to specify the range of interatomic distances that is relevant for the process under study. Alternatively, also the SPRINT topological coordinates can be employed, that are particularly suited for nanostructures. The output is a partitioning of the trajectory into a few structural clusters (i.e., sets of frames), allowing for simpler analysis and visualization. Please read and cite Gallet & Pietrucci, J. Chem. Phys. 139, 074101 (2013)

SpectraScan loads images from scanned curves and exports the pixel coordinates of the curve in csv format. This program is especially for scans of ESR or other spectra, which are to be converted into a computer readable format.

OBExtensions is a extension library for the chemoinformatics library Openbabel. It provides extensions to Openbabel, being mostly GUI widgets. OBExtensions has a 2D/3D viewer, 2D coordinates generator and some other extensions.

md-utils is a set of command line tools written in C designed to perform certain operations and analysis on the molecular dynamics data. The supported operations involve trajectory coordinate transformation to the COM system, Cartesian coordinate transformation to selected internal coordinates and to projected normal mode coordinates, trajectory merging, selecting subsets of trajectory frames, selecting subsets of atoms, permuting atoms, etc. Analysis tools involve 1D, 2D and 3D data binning (histograms), volumetric data handling, etc. A small library, libmd, is an abstraction layer that serves data exchange among different tools.