The power quality (PQ) is a major issue for both electrical utilities and their customers. nonlinear loads cause PQ problems like current harmonics, voltage frequency deviation, sag swell. A unified conditioner (UPQC) utilized in this research to minimize these problems. UPQC made up of two active filters (APFs), one which connected the line series other parallel. Unit Vector Template Generatio...

The accurate environment potential field (EPF) modeling method and highly efficient collision avoidance (CA) approach are key technologies for maritime autonomous surface ships (MASS). A novel model is proposed using electronic navigation chart (ENC) face objects to describe different types of navigable non-navigable areas, an improved artificial (APF) presented realize collaborative CA obstacl...

In this paper, two algorithms have been developed for allocation and size determination of Active Power Filters (APF) in power systems. In the first algorithm, the objective is to minimize harmonic voltage distortion. The objective in the second algorithm is to minimize the new APF injection currents while satisfying harmonic standards. Genetic algorithm is proposed for these two optimization p...

In this paper, two algorithms have been developed for allocation and size determination of Active Power Filters (APF) in power systems. In the first algorithm, the objective is to minimize harmonic voltage distortion. The objective in the second algorithm is to minimize the new APF injection currents while satisfying harmonic standards. Genetic algorithm is proposed for these two optimization p...

OBJECTIVE The aim of this study was to evaluate the effect of neutral sodium fluoride (NNaF) gel and acidulated phosphate fluoride (APF) gel on the surface roughness of colored compomer (Twinky Star), conventional compomer (Compoglass F) and resin-modified glass-ionomer cement (RMGIC) (Photac-Fil). MATERIAL AND METHODS A total of 45 standardized disc-shaped specimens were prepared for each ma...

A community intervention trial was conducted to assess the feasibility of APF gel as a caries-preventive agent in a high-risk group of school children in Bangalore City. The study was conducted in two schools, randomly selected from a list of schools catering to underprivileged children. These schools were randomly allocated into experimental and control groups. Children aged 9-16 years having ...

BACKGROUND A school is generally acknowledged to be a key setting for promoting pupils' health and well-being. METHODS Data from a cross-sectional questionnaire study conducted with all 10th grade pupils in 46 public schools. Depressive symptoms was defined by a positive score on Hopkin's Symptom Check List-10 (HSCL-10). Two composite variables expressing risk were established: (i) presence o...

In this paper we discuss new method for the atomic partition function (APF) computations, which is then applied to highly ionized iron, Fe V through Fe VII. Subsequently we have computed LTE model atmospheres of two hydrogen-rich white dwarf stars of the effective temperatures Teff = 8 × 104 K and 1.2 × 105 K, and log g = 8.0 (cgs units), which included trace abundance of iron. Both models corr...

The purpose of this in vitro study was to compare the effects of a 1-min immersion and of 4-min immersions in an acidulated phosphate fluoride (1.23% APF) foam, a 1.23% APF gel, a 2.0% sodium fluoride (NaF) gel, and water on surface topography and on weight of a composite resin (APH). Forty composite resin specimens were placed into eight groups (N = 5 each). For each treatment, a group of spec...