This paper proposes the use of bridge type fault current limiters (BFCLs) as a potential solution to reduce the impact of fault disturbance on voltage source converter-based high voltage DC (VSC-HVDC) systems. Since VSC-HVDC systems are vulnerable to faults, it is essential to enhance the fault ride-through (FRT) capability with auxiliary control devices like BFCLs. BFCL controllers have been d...

BACKGROUND Administration of vancomycin in critically ill patients needs close regulation. While subtherapeutical vancomycin serum concentration (VSC) is associated with increased mortality, accumulation is responsible for nephrotoxicity. Our study aimed to estimate the efficacy of a vancomycin-dosing protocol in reaching appropriate serum concentration in patients with and without kidney dysfu...

BACKGROUND The major goal of non-surgical periodontal therapy is to reduce or eliminate the subgingival pathogenic microbial flora that is known to be associated with volatile sulfur compounds (VSC). AIM The aim of this study was, therefore, to determine the effect of non-surgical periodontal therapy on the concentration of VSC in mouth air of young adults. SUBJECTS AND METHODS Four hundred...

Voltage Source Converter (VSC) based HVDC is the most recent HVDC technology with extruded DC cables in small and medium power transmission. VSC-HVDC converters include Insulated Gate Bipolar Transistors (IGBT’S) and operated with high frequency Pulse Width Modulation (PWM) in order to get high speed control of both active and reactive power. With VSC-HVDC there is an addition degree of freedom...

This paper presents initial results for defining a method to integrate process models and supporting tools for the support of software development in Internet-based Virtual Software Corporations (VSCs). VSCs are emerging as the organisational form enabling the development of complex, large scale software. However, due to the heterogeneous and temporary nature of VSC interactions, no dedicated s...

This paper proposes a three levels cascade control topology for the VSC and DC/DC converters used in DC grids. The inner control level regulates local current as in all VSC converters. The middle control level uses PI feedback control of local DC voltage on all terminals. At the highest level, each station reference DC voltage is set based on desired power transfer and observing DC voltage limi...

Persistent microorganisms in endodontically treated teeth produce volatile sulfur compounds (VSC) such as methyl mercaptan, hydrogen sulfide, and thioether. In this retrospective study, we evaluated the ex vivo immune response of peripheral blood mononuclear cells to sulfur compounds in 354 patients with systemic diseases. These systemic findings are correlated with semiquantitative values of a...

NTRODUCTION Halitosis is defined as breath that is offensive to others, caused by a variety of reasons including but not limited to periodontal disease, bacterial coating of tongue, systemic disorders and different types of food. It is one of the most frequent claims from patients to the dentist. Halitosis is not a disease but rather a symptom of underlying oral, systemic or psychological condi...

We study structural properties of restricted width arithmetical circuits. It is shown that syntactically multilinear arithmetical circuits of constant width can be efficiently simulated by syntactically multilinear algebraic branching programs of constant width, i.e. that sm-VSC ⊆ sm-VBWBP. Also, we obtain a direct characteriztion of poly-size arithmetical formulas in terms of multiplicatively ...