Physical Sciences and Engineering

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Experimental determination of mechanical properties of abs material components made by rp manufacturing technique

In the recent years utilization of polymeric materials increased due to their good mechanical properties and easy manufacturing. Starting from automotive industry up to food industry polymeric materials are used for obtaining components by molding or by machining. Taking into account the wide range of applications, it is important to know the mechanical behavior of the materials in different loading conditions. Rapid Prototyping Techniques (RPT) are widely used to produce objects with good dimensional accuracy, surface roughness and material strength by adding the material layer by layer.

A graph-based reliable routing scheme for vanets

Vehicular ad hoc networks (VANETs) are a special form of wireless networks made by vehicles communicating among themselves on roads which includes communications among vehicles and between vehicles and road side units. However, due to the high mobility and the frequent changes of the network topology, the communication links are highly vulnerable to disconnection in VANETs. This paper extend the well-known ad hoc on-demand distance vector (AODV) routing protocol with evolving graph theory to propose reliable routing protocol EG-RAODV.

An influence of festival visitors’ motives and satisfaction for the local festival activation

The objective of this study measured the level of satisfaction of festival participants through the festival visitors’ consideration. In other words, this study wanted to find out how the visitors’ considerable factors from the festival participation affect the satisfaction. This study was performed during the festival period (for 24days starting April 24, 2015) in order to analysis about the participational visitors’ motivation and satisfaction of Gwangju Royal Ceramics Festival.

A comparative review on the petrophysical evaluation of thinly bedded reservoirs using conventional and 3d explorer data

This study demonstrates the efficiency of the multi-component induction tool (3DEX) that simultaneously measures the vertical and horizontal resistivity of the formation, by presenting a comparative petrophysical evaluation of thinly bedded reservoirs using Conventional logs and 3DEX data acquired from two different fields of which one is an oil-bearing reservoir formation from Olu field in the Niger Delta province and the other is a gas-bearing reservoir formation from Balda field in North Sea.

Path related extended mean cordial graphs

Let G = (V,E) be a graph with p vertices and q edges. A Extended Mean Cordial Labeling of a Graph G with vertex set V is a bijection from V to {0, 1,2} such that each edge uv is assigned the label ( (⌈f(u)+f(v))⌉)⁄2 where ⌈ x ⌉ is the least integer greater than or equal to x with the condition that the number of vertices labeled with 0 and the number of vertices labeled with 1 differ by at most 1 and the number of edges labeled with 0 and the number of edges labeled with 1 differ by at most 1. The graph that admits a Extended Mean Cordial Labeling is called Extended Mean Cordial Graph.

Variation of output voltage thd for r and rl loads for an efficient developed cascaded multilevel configuration with less number of switches

Multilevel inverter is a very popular in various fields like FACTS devices,HVDC systems, industrial drives,photovoltaic systems etc. It has a large number of advantages like low stress on switches,lower harmonics,low switching losses etc. There are different topologies available like neutral point or diode clamped inverter, flying capacitor inverter etc. each having numerous disadvantages and advantages. The efficiency of this inverter is greatly improved by minimising the number of switches of the configuration used.

Substitution of substitution of co and zn in a and b sites of (pbcu) tio3

Ceramic powders of lead titanate, co- doped with copper (Pb0.9Cu0.1TiO3) and cobalt or zinc, of a perovskite structure were prepared by the sol-gel process by adopting the mode of the destabilization of colloidal solution. The effect of temperature and dopants on the structure of the obtained samples was studied by X-ray diffraction (RX), Raman spectroscopy and scanning electron microscopy (SEM). Analysis of the samples with fluorescence spectroscopy shows that Zn simultaneously occupies the sites A (Cu) and B (Ti) of the structure, creating oxygen vacancies.

Elaboration et caractérisation des composés de structure pérovskite de formule pb (x0.20ti0.80) o3 (x= la, mg, mn, ca, cu, bi et v)

Des échantillons de Pb(X0.20,Ti0.80)O3 (X= Lanthane, Magnésium, Manganèse, Calcium, Cuivre, Bismuth et Vanadium) ont été élaborés par la voie solide conventionnelle. Les températures de calcination, pour les différents échantillons élaborés, ont été choisies dans l’intervalle [800 °C, 900 °C]. La durée de calcination a été de 4 heures. La caractérisation par spectroscopie de diffraction des rayons X montre l’effet de l’élément dopant sur la phase cristalline, la température de calcination et la taille des cristallites des poudres fines élaborées.

Towards A Computer Model Of Attention Fatigue

The exact mechanism of mental fatigue is still not well understood even with the long history of neuroscience and psychology. It is said a human being undergoes mental fatigue when he or she just had a prolonged session of focusing on particular sustained attention task and this could particularly dangerous for certain tasks such as driving. Directed Attention Fatigue (DAF) is caused by an identified mechanic and was described a tug of war between bottom up attention mode and top down attention mode where DAF will cause decrease focus on the task on hand.