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Megha A. Deshmukh,Sang-Joon Park,Hanuman N. Thorat,Gajanan A. Bodkhe,Arunas Ramanavicius,Simonas Ramanavicius,Mahendra D. Shirsat,하태준 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.119 No.-
Current H2 production systems mainly rely on the steam reformation of fossil fuels, whereby CO2 and H2are generated by exhausting their finite source in industry. In this paper, the development of dynamic,highly stable, and cost-effective electro- and photo-catalysts as energy materials crucial for achievingelectro- and photo-catalytic H2 production from water splitting is investigated in terms of engineeringchemistry. Thus, the motivation of this review is to discuss the fundamental physics of water splittingand the recent progress in the design and construction of energy materials based on metal-based catalysts(e.g., noble metals, transition metals, metal oxides, and metal sulfides) along with exceptional nanomaterialssuch as metal–organic frameworks and carbonaceous catalysts. Lastly, this review outlines thefuture challenges and scope to enable the design of active and robust energy materials for hydrogen andoxygen evolution reactions and to thereby promote the efficient production of H2 from water-splittingelectrolysis.
On Rogers--Ramanujan type identities for overpartitions and generalized lattice paths
Megha Goyal 대한수학회 2018 대한수학회보 Vol.55 No.2
In this paper we introduce and study the lattice paths for which the horizontal step is allowed at height $h\geq0$, $h\in \mathbb{Z}$. By doing so these paths generalize the heavily studied weighted lattice paths that consist of horizontal steps allowed at height zero only. Six $q$--series identities of Rogers--Ramanujan type are studied combinatorially using these generalized lattice paths. The results are further extended by using $(n+t)$--color overpartitions. Finally, we will establish that there are certain equinumerous families of $(n+t)$--color overpartitions and the generalized lattice paths.
Megha Ram,Kaare Wallace Strøm 한국외국어대학교 국제지역연구센터 2014 International Area Studies Review Vol.17 No.4
We address the incidence and correlates of mutual veto institutions by examining a global dataset on power-sharing provisions. Our data show that mutual veto provisions are relatively rare and found mostly in diverse societies that are more highly developed than the world average. We find that mutual veto arrangements must be (a) enforceable, (b) inclusive to pacify all potential spoilers and (c) compatible with the interests and incentives of those groups to which they would apply. Mutual veto provisions often fail to meet one or more of these conditions. They are difficult to enforce, as conflict-prone societies often have ineffectual political institutions and weak administrative capacity. It is difficult to make them incentive-compatible, as incumbent powerholders will not benefit from them. Finally, they are often not credible, as the dominant political coalition would find it in its interest to punish any actual exercise of a veto. These conditions jointly explain the near absence of effective mutual veto regimes outside relatively prosperous polities with well-established political institutions.
Liver Pathology : Composite Liver tumors: A radiologic-pathologic
( Megha Nayyar ),( David K Imagawa ),( Temel Tirkes ),( Aram N Demirjian ),( Roozbeh Houshyar ),( Kumar Sandrasegaran ),( Chaitali S Nangia ),( Tara Seery ),( P Bhargava ),( Joon Ii Choi ),( Chandana 대한간학회 2014 Clinical and Molecular Hepatology(대한간학회지) Vol.20 No.4
Bi-phenotypic neoplasm refers to tumors derived from a common cancer stem cell with unique capability to differentiate histologically into two distinct tumor types. Bi-phenotypic hepatocellular carcinoma-cholangiocarcinoma (HCC-CC), although a rare tumor, is important for clinicians to recognize, since treatment options targeting both elements of the tumor are crucial. Imaging findings of bi-phenotypic HCC-CC are not specific and include features of both HCC and CC. A combination of imaging and immuno-histochemical analysis is usually needed to make the diagnosis. (Clin Mol Hepatol 2014;20:406-410)
Development of Play in Pre-Schoolers: Video-Based Analysis of Free and Structured Toy Play Scenario
Megha Mohan,Reenu Celshiya. A,Jayashree S. Bhat The Pacific Early Childhood Education Research Ass 2022 Asia-Pacific journal of research in early childhoo Vol.16 No.3
Play is a universal code, which mirrors the all-round development of a child. Play development reflects the emergence of early cognitive skills in children. The current study profiles the developmental trends of different types of play during the free and structured play scenario in South India. The sample included 48 pre-school children, aged between 3.6 to 5.6 years. Children’s play was recorded in two scenarios, which included free Play (spontaneous Play without any restrictions) and structured toy play (restriction of toy usage limited to the four types of toys provided by investigator), in the classroom settings. The data was analysed using the coding scheme that was adapted by combining two existing standardised play scales i.e. Play Observation Scale and Play in Early Childhood Evaluation System. In the coding scheme, play types were grouped under three domains which were Functional Play, Social Play, and Cognitive Play. Cognitive play was further divided into two domains that are Simple pretend play (SPP) and Complex pretend Play (CPP) which has the subtypes adapted from Play in Early Childhood Evaluation System. The results revealed that the occurrence of play type was higher in the free play scenario and reduced in the structured toy play scenario. A developmental trend was observed in free play over structured toy play among children. The findings would be helpful in planning play-based counselling/intervention strategies for children and create awareness to teachers about the various developmental patterns of play types.
ON ROGERS-RAMANUJAN TYPE IDENTITIES FOR OVERPARTITIONS AND GENERALIZED LATTICE PATHS
Goyal, Megha Korean Mathematical Society 2018 대한수학회보 Vol.55 No.2
In this paper we introduce and study the lattice paths for which the horizontal step is allowed at height $h{\geq}0$, $h{\in}{\mathbb{Z}}$. By doing so these paths generalize the heavily studied weighted lattice paths that consist of horizontal steps allowed at height zero only. Six q-series identities of Rogers-Ramanujan type are studied combinatorially using these generalized lattice paths. The results are further extended by using (n + t)-color overpartitions. Finally, we will establish that there are certain equinumerous families of (n + t)-color overpartitions and the generalized lattice paths.
Flow Visualization in Realistic Arterial Bypass Graft Model
Singh, Megha,Shin, Se-Hyun Biomedical Engineering Society for Circulation 2005 International Journal of Vascular Biomedical Engin Vol.3 No.1
Background: Coronary atherosclerosis artery disease is the leading cause of morbidity and mortality. Coronary artery bypass grafting (CABG) which utilizes the saphenous vein graft, has helped in alleviating the suffering of these patients. Newer techniques are being developed to improve upon the techniques. Still there is significant number of failures, leading to re-grafting or re-vascularization. Some studies have helped in identifying the high and low shear stress regions. Further studies based on their realistic models are required. Material, methods and results: we developed the realistic model of fully blocked right coronary with bypass graft placed at angle of $5^0$ with curvature similar to that of artery. Pulsatile flow of birefringent solution through this model by polarized light was visualized. The images of complete flow field in the model were recorded and analyzed. Regions of high flow disturbances which are prone to further changes are identified. Existence of recirculation in the blocked coronary may initiate new blood-tissue interactions deleterious to bypass graft. Conclusion: Our study shows that by selecting the procedure to place bypass graft at minimum angle with curvature similar to that of artery and smooth sutures may improve the life span of the graft. This study also identified that coronary blocked regions contributing by recirculation flow at the proximal and distal regions of bypass which may require further studies.
Drug adsorption and anti-microbial activity of functionalized multiwalled carbon nanotubes
Saxena, Megha,Mittal, Disha,Boudh, Richa,Kumar, Kapinder,Verma, Anita K.,Saxena, Reena Techno-Press 2021 Advances in nano research Vol.11 No.6
Multiwalled carbon nanotubes (MWCNTs) were first oxidized (O-CNTs) to introduce carboxylic group and then further functionalized (F-CNTs) with m-phenylenediamine, which was confirmed by FTIR and SEM. It was used as an effective adsorbent for the adsorptive removal of diclofenac drug from water. Under optimum conditions of pH 6, stirring speed 600 rpm, the maximum adsorption capacity obtained was 532 mg g<sup>-1</sup> which is superior to the values reported in literature. The adsorption was quite rapid as 25 mg L<sup>-1</sup> drug solution was adsorbed in only 3 minutes of contact time with 10 mg of adsorbent dose. The adsorption kinetics and isotherms were studied using various models to evaluate the adsorption process. The results showed that the data best fit in kinetics pseudo-second order and Langmuir isotherm model. Furthermore, the oxidized and functionalized MWCNTs were applied on gram-negative Escherichia coli and gram-positive Staphylococcus aureus using agar disc diffusion assay to validate their anti-microbial activity. Results were unique as both oxidized and functionalized MWCNTs were equally active against both E. coli and S. aureus. The newly synthesized F-CNTs have great potential in water treatment, with their dual action of removing drug and pathogens from water, makes it potential applicant to save environment.