44 research outputs found

    A Neural Radiance Field-Based Architecture for Intelligent Multilayered View Synthesis

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    A mobile ad hoc network is made up of a number of wireless portable nodes that spontaneously come together en route for establish a transitory network with no need for any central management. A mobile ad hoc network (MANET) is made up of a sizable and reasonably dense community of mobile nodes that travel across any terrain and rely solely on wireless interfaces for communication, not on any well before centralized management. Furthermore, routing be supposed to offer a method for instantly delivering data across a network between any two nodes. Finding the best packet routing from across infrastructure is the major issue, though. The proposed protocol's major goal is to identify the least-expensive nominal capacity acquisition that assures the transportation of realistic transport that ensures its durability in the event of any node failure. This study suggests the Optimized Route Selection via Red Imported Fire Ants (RIFA) Strategy as a way to improve on-demand source routing systems. Predicting Route Failure and energy Utilization is used to pick the path during the routing phase. Proposed work assess the results of the comparisons based on performance parameters like as energy usage, packet delivery rate (PDR), and end-to-end (E2E) delay. The outcome demonstrates that the proposed strategy is preferable and increases network lifetime while lowering node energy consumption and typical E2E delay under the majority of network performance measures and factors

    Identification of a small molecule with activity against drug-resistant and persistent tuberculosis

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    A cell-based phenotypic screen for inhibitors of biofilm formation in mycobacteria identified the small molecule TCA1, which has bactericidal activity against both drug-susceptible and -resistant Mycobacterium tuberculosis (Mtb) and sterilizes Mtb in vitro combined with rifampicin or isoniazid. In addition, TCA1 has bactericidal activity against nonreplicating Mtb in vitro and is efficacious in acute and chronic Mtb infection mouse models both alone and combined with rifampicin or isoniazid. Transcriptional analysis revealed that TCA1 down-regulates genes known to be involved in Mtb persistence. Genetic and affinity-based methods identified decaprenyl-phosphoryl-beta-D-ribofuranose oxidoreductase DprE1 and MoeW, enzymes involved in cell wall and molybdenum cofactor biosynthesis, respectively, as targets responsible for the activity of TCA1. These in vitro and in vivo results indicate that this compound functions by a unique mechanism and suggest that TCA1 may lead to the development of a class of antituberculosis agents

    Fresh and hardened properties of binary blend high strength self compacting concrete

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    Self compacting concrete (SCC) made a remarkable impact on the concrete construction industry because of its innovative nature. Assessment of optimal ratio between chemical and mineral admixtures plays a vital role in developing SCC. In the present work three different mineral admixtures were used as partial substitute in different proportions to cement to produce SCC with a characteristic compressive strength of 60 MPa. All the three types of SCC were investigated for its fresh and hardened properties. From the results, 50% GGBFS, 10% SF and 20% MK were found to the optimum values as partial substitute to cement

    Effect of Acidic Water on Strength, Durability and Corrosion of Concrete

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    Use of poor quality of water in concrete leads to corrosion and ultimately causes failure in concrete, while use of saline water in concrete affects the properties of fresh and hardened concrete. An attempt is made in this study to investigate the effects of various percentage of NaCl present in water used for concreting for different grades of concrete. In this study, specimens of 108 cubes (150 mm x 150 mm x 150 mm), 36 cylinders (300 mm x 150 mm), and 72 cylinders (102 mm x 51 mm) were cast and cured in percentages of NaCl added water to find the workability, strength, durability and corrosion resistance characteristics concrete. The effect of corrosion of steel in the concrete was examined by accelerated electrolytic corrosion method. It was found that, addition of NaCl up to 30% resulted decrease in compressive strength, split tensile strength, higher corrosion rate and chloride ion penetration. However for 20% addition of NaCl these values were found to be moderate.Keywords: Acidic water, compressive strength, durability, corrosion, concrete, RCP

    Effect of Mixed Traffic Flow on Control Delay at Signalized Intersections

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    Operational analysis of transportation facilities is critical for making efficient use of existing transportation resources and for proposing improvements. Signalized intersections are the most complex locations in urban networks. The operational conditions of such intersectionsprofoundly affect the well being of the transportation of goods and passengers in cities. There are several methods available for operational analysis including mathematical models and traffic simulation models; however the Highway Capacity Manual (HCM) has been widelyaccepted and applied as a standard method. Three Measures of Effectiveness (MOE) commonly used to evaluate signalized intersection operations are capacity and volume-tocapacity (v/c) ratio, delay and queue. In the present research work, an attempt is made toestimate the capacity and v/c ratio, control delay and assign them to a Level of Service (LOS) at three identified signalized intersections of a medium sized city in India. The results obtained are analysed and remedial measures suggested to improve the operational performance of study intersections. In addition, the field measured control delay is compared with HCM 2000 delay model and Gopal Patil (2002) delay model developed for mixed traffic in Indi

    MECHANICAL AND DURABILITY PROPERTIES OF SLAG BASED RECYCLED AGGREGATE CONCRETE

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    Abstract-In this paper, the possibility of using recycled aggregate (RA) and ground granulated blast furnace slag (GGBFS) to produce a structural concrete was studied by compromising strength to a lesser extent. Hence an attempt has been made to study the strength and durability characteristics of the GGBFS-based recycled aggregate concrete. Four different groups of mixes were designed by replacing natural coarse aggregate (NA) 0, 25, 50 and 100% with recycled coarse aggregates. In each group the effect of RA was studied by replacing cement with GGBFS in different percentages from 20 to 50% with an increment of 10%. The effects of RA and GGBFS on fresh and hardened concrete properties were studied and the results were compared with natural aggregate concrete (NAC) and optimum replacement of RA and GGBFS was also found. Experimental results indicate that increase in concrete strength for all NA replacements with RA for GGBFS concrete upto 40% at the age of 90 days and further addition of GGBFS shows reverse trend

    Load deformation characteristics of GFRP reinforced HPC square columns

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    Performance of glass fiber reinforced polymer (GFRP) reinforced high performance concrete compression members under axial loading were studied by conducting detailed experimental investigations. For the present study, twenty-four square columns of size 150 mm and slenderness ratios of 6, 8, 10 and 12 were cast, in which twelve columns reinforced with GFRP and the remaining twelve with conventional steel.  For each slenderness ratio, three different percentages of reinforcement was tried with 1.4%, 2% and 3.5% each as longitudinal reinforcement for both GFRP and steel. Performance characteristics such as load carrying capacity, axial deformation, lateral deformation and rebar axial strain were studied in detail. Parametric study was done taking L/D ratio and percentage of reinforcement as parameters. Keywords: Load carrying capacity, axial deformation, lateral deformation, rebar axial strain, L/D ratio, Glass Fiber Reinforced Polyme

    EFFECT OF LDPE RAW MATERIAL ON STRENGTH, CORROSION AND SORPTIVITY OF CONCRETE

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    Many researchers focused on effect of Low Density Poly Ethylene (LDPE) on bituminous pavements or concrete to modify the strength and ductility in view of reusing the abundant quantity of non-degradable LDPE material available. It also reduces the use of bituminous materials and disposal problems of such waste material. Developing countries are moving towards construction concrete pavement or converting bituminous pavements into concrete pavements. Hence in this paper an attempt has been made to study the feasibility of using LDPE raw material itself as a modifier in cement concrete with a characteristic compressive strength of 20 MPa. Present study focuses on effect of addition of LDPE raw material (3, 4 and 5%) under different temperatures (70°C, 80°C and 90°C) and duration of thermal curing (4, 8 and 16 hours) on compressive strength, corrosion resistance and sorptivity. It was inferred from the results that, addition of LDPE raw material considerably increases the compressive strength, resistance against corrosion and permeability. Results also revealed that concrete with 3% LDPE modifier for 80°C with 4 hours of thermal curing was found to be optimum

    Effects of Mineral Admixtures, Water Binder Ratio and Curing on Compressive Strength of Concrete

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    Considerable research has focused on the effect of mineral admixtures on concrete during the past two decades. Suitable addition of mineral admixtures like fly ash (FA), silica fume (SF), metakaolin (MK) etc., in concrete improves strength and durability characteristics of concrete. This paper presents the laboratory investigation on the effects of mineral admixtures and water binder ratio on compressive strength is discussed. The study was conducted for three different mineral admixtures namely; FA, SF and Mk with different water cement ratios of 0.32, 0.35, 0.4 and 0.5. The admixture proportion varies from 0 to 15% with an increment of 5% for SF and MK and 10 to 30% with an increment of 10% for FA. The compressive strengths were determined at the age of 3, 7, 14, 28 and 90 days with and without admixture and a comparative study was also made. From the results it is concluded that FA based concrete offered more strength for lower water cement ratios (0.32 & 0.35) and MK modified concrete showed greater strength for higher water cement ratios (0.4 & 0.5). The strength enhancement of SF concrete was more or less similar for all water cement ratios. The outcome of this research work provides an optimal and economical mix for better strength
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