24 research outputs found
Efficacy of graphene oxide-based nanomaterials in customized cement mixtures, a review of recent research trends
No full textAccomplishing multifunctional applications in modern concrete infrastructure requires structural components with excellent mechanical, durability, and smart qualities. Nanotechnology has been widely used in cement materials to improve structural qualities and solve the shortcomings of energy consumption, environmental protection, and poor toughness of conventional cement materials to meet these growing needs. Due to its outstanding mechanical characteristics and active functional groups, graphene oxide (GO), a typical sheet-like graphene derivate, has been experimentally demonstrated to significantly increase the strength and durability of concrete when used in very tiny dosages. This review covers the approaches that may be used to analyse the mechanical, durability, and microstructure performance of GO's reinforcement in cement composites. The scientific community may utilize this review to develop multifunctional concrete structures for the future construction industry and get fresh insights into nano-cement composites
Exploring the Factors Affecting the Purchase Likelihood of e-Tailer Private Labels.
No full textIn today’s extremely competitive retail marketplace environment, developing and managing profitable private label offerings has become significant for most retailing companies. The purpose of this paper is to understand the influence of e-tailer reputation, product manufacturing country favourability, and online consumer rating on the purchase likelihood of e-tailer private labels. We find that product online consumer ratings positively impact the purchase intention of the private labels. E-tailer reputation has shown a positive impact on the future purchase intentions whereas, country favourability’s effect is found at the time of actual purchase of e-tailer private labels. Being the first research to study the impact of country favourability, e-tailer reputation on e-tailer private labels, this paper offers some insights to the e-tailers.
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Coriolis coupling and isotopic effects on the quantum dynamics of H(
No full textWe here report the effect of Coriolis coupling (CC) on the dynamics of H(S) + NaH(X) reaction in the ground electronic state (1 ), employing a time-dependent wavepacket approach on a new potential energy surface. Initial state-selected and energy-resolved reaction probabilities, integral cross sections and thermal rate constants are obtained by performing the exact CC and centrifugal sudden (CS) calculations. The reactivity of hydride destruction channel (R1) is generally found to be greater than the hydrogen exchange channel (R2), in which the former channel is highly exoergic (by 2.788 eV) and the latter one is thermoneutral. The magnitude of reaction probabilities of R1 channel and the resonance features seen in that are effectively reduced at given energies by the exact CC approach compared to the CS model; on the other hand, CC enhances the reactivity of R2 channel compared to CS results. A comparison of CC and CS results reveals that neglecting the Coriolis coupling overestimates both cross sections and rate constants of R1 channel and underestimates the same for R2 channel. The CC also plays a significant role in the title reaction when the reagent NaH(v, j) molecule gets excited. In addition, the effect of isotopic substitution (H atom by D) on the H + NaH reaction is also examined and noted that the D + NaH reaction is highly reactive than the other isotopologues
A PROSPECTIVE SINGLE-BLINDED STUDY ON THE SAFETY AND EFFICACY OF ZINC SUPPLEMENTATION IN PULMONARY TUBERCULOSIS
Get PDFAim and Objectives: The aim of the study was to study the serum zinc (Zn) levels, safety, and efficacy of Zn supplementation in pulmonary tuberculosis (PTB) patients.Methods: A randomized single-blinded study of two groups: Group A received conventional TB therapy while Group B received conventional TB therapy along with 15 mg of Zn tablet. 40 patients were assigned in each group by randomized permuted blocks.Results: After 8 weeks of treatment in Group A 27 patients and Group B 36 patients were found to be sputum negative with p=0.0421 and 0.0629. After 24 weeks of treatment in Group A 37 patients and Group B 40 patients were found to be sputum negative with p=0.00976 and 0.00971. By this, the given treatment was effective in the patients with PTB.Conclusion: Zn supplementation improves the effect of TB medication treatment and results in earlier sputum smear conversion
A 2D model of a circular electrochemical cell containing a functionalized nanopillar electrode
No full text<p><b>Copyright information:</b></p><p>Taken from "Role of reaction kinetics and mass transport in glucose sensing with nanopillar array electrodes"</p><p>http://www.jbioleng.org/content/1/1/5</p><p>Journal of Biological Engineering 2007;1():5-5.</p><p>Published online 10 Oct 2007</p><p>PMCID:PMC2241827.</p><p></p> The inner center circle is for generating the swirling vortex force to stir the solution and the small off-center circle is for creating a drop of uniform concentration of glucose prior to the kinetics analysis. A magnified view of the nanopillar electrode is shown at the upper right corner
Cutting the Gordian knot [?]: a response to Lukka and Vinnari (2014)
No full textPurpose - The purpose of this paper is to constructively discuss the meaning and nature of (theoretical) contribution in accounting research, as represented by Lukka and Vinnari (2014) (hereafter referred to as LV). The authors aim is to further encourage debate on what constitutes management accounting theory (or theories) and how to modestly clarify contributions to the extant literature. Design/methodology/approach - The approach the authors take can be seen as (a)n interdisciplinary literature sourced analysis and critique of the movement's positioning and trajectory" (Parker and Guthrie, 2014, p. 1218). The paper also draws upon and synthesizes the present authors and other's contributions to accounting research using actor network theory. Findings - While a distinction between domain and methods theories ... may appear analytically viable, it may be virtually impossible to separate them in practice. In line with Armstrong (2008), the authors cast a measure of doubt on the quest to significantly extend theoretical contributions from accounting research. Research limitations/implications - Rather than making (apparently) grandiose claims about (theoretical) contributions from individual studies, the authors suggest making more modest claims from the research. The authors try to provide a more appropriate and realistic approach to the appreciation of research contributions. Originality/value - The authors contribute to the debate on how theoretical contributions can be made in the accounting literature by constructively debating some views that have recently been outlined by LV. The aim is to provide some perspective on the usefulness of the criteria suggested by these authors. The authors also suggest and highlight (alternative) ways in which contributions might be discerned and clarified
Manipal lifestyle modification score to predict major adverse cardiac events in postcoronary angioplasty patients
No full textBackground: Lifestyle modification (LSM) such as prudent diet, physical activity, avoidance of smoking, and maintaining a healthy weight may considerably decrease the risk for coronary artery disease. Objective: The primary objective of this study was to develop a new LSM scoring system and investigate the correlation between adherence to LSM and incidence of major adverse cardiac events (MACEs) at 12-month follow-up. Method: A total of 1000 consecutive patients who underwent percutaneous transluminal coronary angioplasty (PTCA) were included in this prospective single-center study. Manipal lifestyle modification score (MLSMS) was developed by using five lifestyle-related factors. Adherence to LSM at the baseline and subsequent follow-ups was determined by using MLSMS. The MACE at 1-, 6-, and 12-month follow-up were analyzed. Results: There was a significant reduction in overall adherence to LSM (p < 0.001) at 12-month follow-up. Nonadherence to LSM [hazard ratio (HR) 0.575; 95% confidence interval (CI) 0.334–0.990; p < 0.046] and noncompliance to medication (HR 2.09; 95% CI 1.425–3.072; p < 0.001) were independent predictors of MACEs after PTCA. The cumulative MACE was 15.4%, which includes 4.9% of all-cause death, 5.2% of nonfatal myocardial infarction, 2.0% of target lesion revascularization, 1.8% of target vessel revascularization, and 1.3% of stroke at 12 months. The incidence of MACEs at 12 months was significantly (p = 0.03) higher in LSM nonadherent compared with LSM adherent patients. Conclusion: There is an overall reduction in adherence to LSM on successive follow-ups and a significant association between the incidence of MACEs and the lack of adherence to LSM. MLSMS is a simple and effective evaluation tool in predicting MACEs in this group of patients. Keywords: Coronary heart disease, Lifestyle modification, Percutaneous coronary intervention
Design of MEMS based Capacitive Pressure Sensor to Monitor the Respiratory Conditions of Patients
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Recent Developments in Copper-Based Catalysts for Enhanced Electrochemical CO<sub>2</sub> Reduction
Get PDFThe drastic climate change imposing adverse environmental effects receives serious research attention for finding a suitable solution. The replacement of conventional fossil energy sources with renewable and sustainable energy sources is the potential route; and thus, manifests as a viable solution. Accordingly, the electrocatalytic carbon dioxide (CO2) reduction process coupled with the renewable energy source is an emerging strategy for adopting a sustainable approach. However, the existing challenges in designing suitable catalyst, support material, electrolyte, inadequate selectivity, and intermediate reactions of CO2 reduction demand substantial research advancement. Numerous studies reported for the CO2 reduction process highlight the importance of catalyst design and product selectivity. Importantly, the copper-based catalysts, capable in the output of multi-carbon products, are reported as a “star” material. This review; therefore, focuses on catalyst design strategies, unique structural/morphological features, and product selectivity of diverse copper-based catalysts. The outstanding findings of copper-based catalysts and the corresponding products are critically discussed with adequate figures of merits. The impact of structural/morphological features on product selectivity is discussed in detail. The future scope and author perspectives on copper-based catalysts for the feasible electrocatalytic CO2 reduction application are summarized.</p
