Introduction Sulfur is required for the biosynthesis of several essential compounds like amino acids (cysteine and methionine), vitamins (biotin, thiamin), and prosthetic groups (Fe-S clusters) in all organisms. In order to synthesize these compounds, the sulfur has usually to be in a reduced state, most commonly as (hydrogen) sulfide. In the absence of an environmental supply of reduced sulfur...

By partitioning the electron density into subsystem contributions, the Frozen Density Embedding (FDE) formulation of subsystem Density Functional Theory (DFT) has recently emerged as a powerful tool for reducing the computational scaling of Kohn-Sham DFT. To date, however, FDE has been employed to molecular systems only. Periodic systems, such as metals, semiconductors, and other crystalline so...

This paper attempts to introduce the GENSEC security subsystem and client credentials interfaces to interested bystanders and developers on the Samba4 project. GENSEC attempts to abstract details about user authentication into a single place, providing a simple API to the rest of Samba, while remaining compatible with Microsoft’s implementations of the same security protocols. Likewise the clie...

In this research, the thermodynamic investigation of the tri-generation system is performed by the first and second law of Thermodynamics. The trigeneration system under study consists of three subsystems including the solar subsystem, Kalina subsystem and lithium bromide-water absorption chiller subsystem. The proposed system generates power, cooling and hot water using solar energy. The syste...

In standard approaches, cognition is assumed to be a distinct functional module from action and interaction, on the one hand, and motivation, on the other hand. I argue that the apparent possibility of such modularization is itself a consequence of a false underlying presupposition concerning the nature of representation. An alternative model of representation is outlined, and it is shown that ...

Given an infeasible set of linear constraints, finding the maximum cardinality feasible subsystem is known as the maximum feasible subsystem problem. This problem is known to be NP-hard, but has many practical applications. This paper presents improved heuristics for solving the maximum feasible subsystem problem that are significantly faster than the original, but still highly accurate. (Linea...

This paper presents results of a coastal decision making system that utilizes the following tools: Internet, wireless technology, and Geographic Information Systems (GIS). The developed system consists of an on-site mobile spatial subsystem, a coastal structure permitting subsystem, and a web-based shoreline erosion awareness subsystem. The system is being tested and developed for applications ...