Highly electroactive Zn-embedded Ni
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nanosphere and its ZnS/Ni
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-based nanocomposites were prepared by a simple hydrothermal route. The prepared samples were characterized by X-ray ...diffraction (XRD), Fourier transformed infrared spectra (FTIR), high-resolution scanning electron microscope (HR-SEM), transmission electron microscope (TEM), energy-dispersive X-ray spectral (EDX) techniques. The XRD analysis revealed the formation of orthorhombic phase of Zn-embedded Ni
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nanosphere for hydrothermally treated sample. The supercapacitance behavior of crystalline Zn-embedded Ni
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nanosphere and ZnS/Ni
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nanocomposite modified electrodes were investigated using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) techniques. Zn-embedded Ni
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nanosphere prepared by hydrothermal route achieved highest specific capacitance value of 145 F/g in 1 A/g compared to the calcined sample modified electrodes. The maximum capacity retention of 100, 96 and 90% at 2000 cycles @1 A/g were observed for the pristine Zn–Ni
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and calcined Zn-Ni
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at 200 and 300 °C, respectively.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Flying Ad-hoc Network (FANET) is described as a special kind of ad-hoc network coming under the family of Mobile Ad-hoc Network (MANET). FANETs is characterized to have high range of mobility when ...comparing with MANET. Setting up the route and maintaining its lifetime is a tedious job in FANET, because the MANET routing protocols that already exist will never fit for FANET because of its increased level of mobility, environmental circumstances and topography structure. There arises a need for bio-inspired based routing protocol to overcome the obstacles. This paper proposes Artificial Bee Colony Inspired Protocol inspired from the bio-inspired concepts. The proposed protocol gradually reduces the level of congestion occurring at different routing path, where it considers the successful route setup and its life time to increase the data delivery. In ABCIP, bee colony is enhanced to analyze and choose the routing path instead of picking up in random. Simulation is carried out using NS2and the results indicates the proposed protocol considerably performs better than the existing protocols in maximizing the successful route setup and its life time, which minimizes the service disruption.
► High-energy ball milling process has been successfully employed to synthesize Al–x%Mg–5wt% SiO2 (x=0.5, 1, 2.5, 5) nanocomposites. ► Increase in the amount of Mg in the composite powder results in ...a finer crystallite size. ► The hardness of nanocomposites is more than twice as high as that of microcomposite. ► Increase in hardness is attributed to (a) formation of hard phase MgAl2O4 spinel along with Al2O3 and (b) finer crystallite size obtained by SPS process.
Mechanical alloying by high-energy ball milling is successfully used to produce a metal matrix composite of Al–Mg reinforced with amorphous silica particulate. Four different compositions are chosen with varying Mg content (0.5, 1, 2.5 and 5 by wt.%) by keeping SiO2 content constant at 5wt.% to make nanocomposites by high energy ball milling and microcomposites by mechanical mixing. No new phases are found in 20h mechanically alloyed Al–Mg–SiO2 metal matrix composite. XRD study showed Mg is completely dissolved into the Al matrix. XRD observation also showed decrease in crystallite size and increase in lattice strain with progress of mechanical alloying. SEM micrographs indicate decrease in particle size via fracture and cold welding phenomena. The powders are made in the form of cylindrical pellets of 20mm diameter by Spark Plasma Sintering. X-ray diffraction analysis of the pellets obtained after sintering indicates the evolution of MgAl2O4 spinel structure along with Al2O3. Vickers hardness values observed for nanocomposites are more than twice as high as that of microcomposites.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Renewable energy, particularly the solar energy, is gaining moreimportance worldwide for its clean, non polluting, inexhaustible andcost free nature. Though there are many applications possible, an ...im-portant factor is that solar energy is time dependant in nature. Hencethe commercial acceptance and the economics of solar thermal utilitiesor devices are tied to the design of an efficient thermal storage system tomeet the time-dependant supply and end use requirements. Latent heatthermal storage units have received greater attention in recent years,due to their isothermal behavior during the charging and dischargingprocesses, and higher energy storage density. In this study, an experi-mental investigation is performed to analyze the transient behavior of apacked bed latent heat storage unit, comprised of a cylindrical storagetank filled with Phase Change Material (PCM). PCM is encapsulated inspherical containers for thermal energy management and efficient utili-zation of solar energy. Applications include space heating and industrialdrying. Experimental results are reported and discussed.
We have previously shown that aggregation of microbeads coated with N-CAM and Ng-CAM is inhibited by incubation with soluble neurocan, a chondroitin sulfate proteoglycan of brain, suggesting that ...neurocan binds to these cell adhesion molecules. To investigate these interactions more directly, we have tested binding of soluble 125I-neurocan to microwells coated with different glycoproteins. Neurocan bound at high levels to Ng-CAM and N-CAM, but little or no binding was detected to myelin-associated glycoprotein, EGF receptor, fibronectin, laminin, and collagen IV. The binding to Ng-CAM and N-CAM was saturable and in each case Scatchard plots indicated a high affinity binding site with a dissociation constant of ∼1 nM. Binding was significantly reduced after treatment of neurocan with chondroitinase, and free chondroitin sulfate inhibited binding of neurocan to Ng-CAM and N-CAM. These results indicate a role for chondroitin sulfate in this process, although the core glycoprotein also has binding activity. The COOH-terminal half of neurocan was shown to have binding properties essentially identical to those of the full-length proteoglycan. To study the potential biological functions of neurocan, its effects on neuronal adhesion and neurite growth were analyzed. When neurons were incubated on dishes coated with different combinations of neurocan and Ng-CAM, neuronal adhesion and neurite extension were inhibited. Experiments using anti-Ng-CAM antibodies as a substrate also indicate that neurocan has a direct inhibitory effect on neuronal adhesion and neurite growth. Immunoperoxidase staining of tissue sections showed that neurocan, Ng-CAM, and N-CAM are all present at highest concentration in the molecular layer and fiber tracts of developing cerebellum. The overlapping localization in vivo, the molecular binding studies, and the striking effects on neuronal adhesion and neurite growth support the view that neurocan may modulate neuronal adhesion and neurite growth during development by binding to neural cell adhesion molecules.
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Summary Background Cardiopulmonary bypass initiates a systemic inflammatory response syndrome that is associated with postoperative morbidity and mortality. Steroids suppress inflammatory responses ...and might improve outcomes in patients at high risk of morbidity and mortality undergoing cardiopulmonary bypass. We aimed to assess the effects of steroids in patients at high risk of morbidity and mortality undergoing cardiopulmonary bypass. Methods The Steroids In caRdiac Surgery (SIRS) study is a double-blind, randomised, controlled trial. We used a central computerised phone or interactive web system to randomly assign (1:1) patients at high risk of morbidity and mortality from 80 hospital or cardiac surgery centres in 18 countries undergoing cardiac surgery with the use of cardiopulmonary bypass to receive either methylprednisolone (250 mg at anaesthetic induction and 250 mg at initiation of cardiopulmonary bypass) or placebo. Patients were assigned with block randomisation with random block sizes of 2, 4, or 6 and stratified by centre. Patients aged 18 years or older were eligible if they had a European System for Cardiac Operative Risk Evaluation of at least 6. Patients were excluded if they were taking or expected to receive systemic steroids in the immediate postoperative period or had a history of bacterial or fungal infection in the preceding 30 days. Patients, caregivers, and those assessing outcomes were masked to allocation. The primary outcomes were 30-day mortality and a composite of death and major morbidity (ie, myocardial injury, stroke, renal failure, or respiratory failure) within 30 days, both analysed by intention to treat. Safety outcomes were also analysed by intention to treat. This study is registered with ClinicalTrials.gov , number NCT00427388. Findings Patients were recruited between June 21, 2007, and Dec 19, 2013. Complete 30-day data was available for all 7507 patients randomly assigned to methylprednisolone (n=3755) and to placebo (n=3752). Methylprednisolone, compared with placebo, did not reduce the risk of death at 30 days (154 4% vs 177 5% patients; relative risk RR 0·87, 95% CI 0·70–1·07, p=0·19) or the risk of death or major morbidity (909 24% vs 885 24%; RR 1·03, 95% CI 0·95–1·11, p=0·52). The most common safety outcomes in the methylprednisolone and placebo group were infection (465 12% vs 493 13%), surgical site infection (151 4% vs 151 4%), and delirium (295 8% vs 289 8%). Interpretation Methylprednisolone did not have a significant effect on mortality or major morbidity after cardiac surgery with cardiopulmonary bypass. The SIRS trial does not support the routine use of methylprednisolone for patients undergoing cardiopulmonary bypass. Funding Canadian Institutes of Health Research.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK, ZRSKP
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Construction Worker Hiring Management System Dr R Premsudha; Pon Rathanvel; Santhoshkumar G ...
International Journal of Advanced Research in Science, Communication and Technology,
5/2024
Journal Article
Open access
The Integrated Construction Management System (ICMS) is a sophisticated web-based application developed to optimize the management processes associated with construction projects. Leveraging a ...technology stack that includes HTML, CSS, Bootstrap, PHP, and MySQL, this system aims to streamline communication, collaboration, and resource management within construction teams, ultimately contributing to the successful and efficient completion of projects. One of the primary features of ICMS is its robust user authentication and authorization system. The application implements a secure login mechanism that authenticates users while assigning distinct access levels based on their roles within the construction project. This ensures that project managers, architects, engineers, and other stakeholders have tailored access to relevant information and functionalities. The project dashboard serves as a centralized hub, providing a comprehensive overview of the project's status, milestones, and critical updates. Through real-time tracking of project progress, ICMS facilitates effective decision-making by offering stakeholders immediate insights into the current state of affairs. This dynamic approach extends to task and resource management, where tasks can be created, assigned, and tracked in real time, ensuring optimal workforce utilization
Phosphacan is a chondroitin sulfate proteoglycan produced by glial cells in the central nervous system, and represents the extracellular domain of a receptor-type protein tyrosine phosphatase ...(RPTPζ/β). We previously demonstrated that soluble phosphacan inhibited the aggregation of microbeads coated with N-CAM or Ng-CAM, and have now found that soluble 125 I-phosphacan bound reversibly to these neural cell adhesion molecules, but not to a number of other cell surface and extracellular matrix proteins. The binding was saturable, and Scatchard plots indicated a single high affinity binding site with a K d of ∼0.1 nM. Binding was reduced by ∼15% after chondroitinase treatment, and free chondroitin sulfate was only moderately inhibitory, indicating that the phosphacan core glycoprotein accounts for most of the binding activity. Immunocytochemical studies of embryonic rat spinal cord and early postnatal cerebellum demonstrated that phosphacan, Ng-CAM, and N-CAM have overlapping distributions. When dissociated neurons were incubated on dishes coated with combinations of phosphacan and Ng-CAM, neuronal adhesion and neurite growth were inhibited. 125 I-phosphacan bound to neurons, and the binding was inhibited by antibodies against Ng-CAM and N-CAM, suggesting that these CAMs are major receptors for phosphacan on neurons. C6 glioma cells, which express phosphacan, adhered to dishes coated with Ng-CAM, and low concentrations of phosphacan inhibited adhesion to Ng-CAM but not to laminin and fibronectin. Our studies suggest that by binding to neural cell adhesion molecules, and possibly also by competing for ligands of the transmembrane phosphatase, phosphacan may play a major role in modulating neuronal and glial adhesion, neurite growth, and signal transduction during the development of the central nervous system.
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We have developed a novel method of calculating the radiological magnification of the hip using two separate radio-opaque markers. We recruited 74 patients undergoing radiological assessment ...following total hip replacement. Both the new double marker and a conventional single marker were used by the radiographer at the time of x-ray. The predicted magnification according to each marker was calculated, as was the true radiological magnification of the components. The correlation between true and predicted magnification was good using the double marker (r = 0.90, n = 74, p < 0.001), but only moderate for the single marker (r = 0.50, n = 63, p < 0.001). The median error was significantly less for the double marker than for the single (1.1% vs 4.8%, p < 0.001). The double marker method demonstrated excellent validity (intraclass correlation coefficient = 0.89), in contrast to the single marker (0.32). The double marker method appears to be superior to the single marker method when used in the clinical environment.
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