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Volume 9 Issue 1

S.No. Title & Authors Page No View

Title : Effect of Chopped Glass Fibers on The Strength of Concrete Tiles

Authors : Akshaya Kumar Shukla, Dr. Bharat Nagar

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Abstract :

The comparative study of fibre glass with test of compressive strength, split-tensile strength and flexural strength were performed on M-30 grade cube and tiles specimen concrete as per norms  IS 10262. The size of aggregates used was 20mm maximum. To analyze the effect on compressive strength, flexural strength, split-tensile strength 6 cubes, 6 tiles  were casted and tested.

A practical result of glass fiber reinforced concrete in the form of concrete tiles was taken into consideration without any special technique was used to produce these tiles. The tiles thickness was 20mm or size of aggregates used was 6mm is maximum. The proportion of mix used was 1:1.80:2.60 and The ratio of water cement kept consistent and the percentage of admixture was varied from .6 to 1.2 to maintain the slump in between 60mm to 120mm. The fibres size used were 5micron meter to 25 micron meter and the fibres were alkali resistant. The experimental study of the short fibres on, compressive strength wet transverse strength and water absorption was carried out. Six full sized tiles 15cm*15cm*2.5cm were tested and the results recorded.


Title : Antibiotic Susceptibility Profile of Staphylococcus Aureus Isolated From Food Handlers in Abuja, Nigeria Review

Authors : Anowai C. O., Agarry O. O., Akin-Osanaiye B. C.

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The antibiotic susceptibility profile of S. aureusisolated from food handlers was evaluated in Abuja using standard epidemiological and agar disc diffusion methods. The result showed that out of 180samples collected from the six area councils in Abuja, nasal swabs had 18.2% of S. aureus isolates and hand swabs had 12.3%. The prevalence rate of S. aureus was 15.5% (28) out of 180 food handlers sampled, the highest occurrence (68.8%) was observed in age group 20 – 39 years, while there was no significant difference in the distribution of S. aureus in the area sampled. Male food handlers (64.3%) had higher infection rate compared to their female counterparts (35.7%) except in AMAC and Kwali area councils. The S. aureus isolates were highly resistant to Cefoxitin and Oxacillin (82.1%) and Tetracycline (71.4%); mildly resistant to Ceftazidime (64.3%), Amoxicillin (53.6%), Erythromycin (50.0%) and Clindamycin (46.4%), but 100% susceptible to Vancomycin, Linezolid (85.7%) and Ciprofloxacin (67.9%). Significant percentages of the isolates (35.7%) weremultidrug resistant and 60.7% had MARI index > 0.2. The most common resistance pattern observed wasFOX,OX,CIP, and it occurred in 18.8% of the populace. This study showed the possibility of food handlers serving as route of transmission of antibiotic resistance pathogens and more so showcase the need to monitor the antimicrobial susceptibility profile of pathogenic bacteria in our environment as this will enable clinicians, in selecting empiric antimicrobial therapy,formulate rational public healthcare policies, and provide useful information on the global surveillance of this pathogen.


Title : New Studies of Thermal Evolution Process

Authors : Alexandre Titov

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Using new experimental techniques of synchronous differential thermal measurements, studies of thermal evolution processes are performed in a tungsten carbide gauge block that is, in the material often used in interferometric length measurements in international comparisons. It is shown experimentally that the consecutive states of the system under our experimental conditions can be only described as an irreversible in time, non-repeatable evolution process that is characterized by braking symmetries in time and in space. As the studied system is an open one, the standard laws of conservation of energy and momentum for the system (following from the theories developed in the framework of Newtonian paradigm) are clearly violated. The experiments, performed with the new material, obviously demonstrate that the superposition principle is not valid for electromagnetic fields interacting with material objects. It is proved that the fluxes of energy and momentum of the external field through the surface of the material object is the driving source of all changes in the properties and in the structure of the irradiated object. The hysteresis curves, which are changing continuously with the variations of the observation position and in time, characterize the evolution process that is observed in two different locations on the surface of material artifact but at the same time moment. All the changes inside the object are associated with the propagation of the field-particle system within the material artifact as a response to the absorption of the fluxes of energy and momentum of the external field that is created by all external partners of the specified object in the system. The parameters of the propagation of the field-particle system (velocity, amplitude) depend critically on the previous history of the object. The interaction of material objects through the common field realizes the Leibniz’s principle of “interrelation of one to all, and of all to one. When the evolution of each material object occurs under the influence of the infinite number of correlated factors, the description of the resulting non-repeatable, irreversible in time process is not possible in terms of mathematics. Here, we present one of the experimental demonstrations of the basic principle of Leibniz relational world:” Every simple Substance is by its nature a concentration, and a living mirror of the whole Universe, according to its Point of view