1,014 research outputs found
Characterization and Dielectric Properties of LaMnO3 Nanofibers
No full textA new approach, combining sol-gel process with electrospinning technique was used to prepare LaMnO3 /PVA composite nanofibers. In this research work, LaMnO3 nanopowders were firstly prepared by calcination of composite carbonate at 1000 °C for 30 min. Electrospinning technique has been extensively explored as a simple and versatile method for drawing nanofibers from polymer solutions. LaMnO3 / PVA perovskite-type nanofibers were obtained after annealed at 500 °C, 600 °C, 700 °C and 800 °C for 2 h respectively. Novel polycrystalline LaMnO3 nanofibers were yielded at different temperatures as the final products. Phase formation and crystal structure of LaMnO3 nanopowders were characterized by X-ray diffraction (XRD). Field Emission Scanning Electron Microscope (FESEM) images revealed that LaMnO3 as-spun nanofibers on Al foils were attracted to be in the range of 60 nm to 120 nm in diameters with electrospinning set-up for 20 min. The modification and functionalize sample surface at a nanometer range of LaMnO3 nanofibers were examined by Atomic Force Microscopy (AFM). The dielectric properties of LaMnO3 nanofibers were identify by C-f, r-f, tan -f and ac-f characteristics. The qualifications of LaMnO3 nanofibers were successfully yielded by the electrospinning technique as final products. The results obtained from this research will lead to enable new levels of electronic applications, biomedical applications and protective clothing as the field of nanotechnology
Diversity of Fish Species in Nat Min Chaung In, Singu Township
No full textThe study was carried out in Nat Min Chaung In from July, 2015 to January 2016 to evaluate the species richness and diversity of fish fauna related to water physiochemical parameters. Collection of data was performed bimonthly. Data were analyzed by Margalef (1958), Simpson (1949), Shannon-Wiener (1949) and Hill (1973). A total of 39 species belonging to 27 genera, 16 families and eight orders were recorded in the study area. The order Cypriniformes (38.46%) was found to be the highest inspecies composition. Among the species recorded, Corica soborna was dominant species. The value of Marglef's richness index, d (3.8165) was the highest in August. The values of Simposon's index D (0.0815), Shannon-Weiner's index H' (2.7879), Hill diversity indices N1 (16.0995), N2 (12.2727) were recorded during November. The highest evenness value E (0.8046) was found in January. According to the value of physiochemical parameter of water in the study area, the maximum depth of water 13.5 m in July and the minimum 4.5 m in January were found. The highest value of water temperature (32.5°C) was observed in July and the lowest value of water temperature (21.4°C) was recorded in December. pH ranged from 7.4 in August to 8.2 in November. Dissolved oxygen ranged from 3.8 mg/L in September to 6.8 mg/L in November. The monthly variation of physiochemical parameters of water quality in the study area directly influenced on the composition, richness and diversity of fish fauna. Based on the result of study, it may be concluded that the richness of fish fauna and species diversity is useful for implementing conservation strategies in order to maintain the sustainability of fisheries in Nat Min Chaung In
Personalized Social Proof for Persuasive Human-Robot Interaction
No full textDehydration is an important challenge, especially in elderly care. This study investigates the effects of a verbal statement of personalized social proof, i.e., an utterance that evokes participants’ gender identity, on the persuasiveness of a robot when encouraging people to drink more. In the scenario used, the robot suggests participants to drink more water once over the course of a 10–15 min interaction. At the end of the experiment, while filling out a questionnaire, participants who heard the utterance containing personalized social proof drink significantly more water than those who did not hear a persuasive utterance. Also the evaluation of the robot is influenced by the persuasive message. Thus, appealing to participants’ social identity when evoking social proof is effective in verbal human-robot interaction
Sustained hemodynamic and clinical effects of a new cardiotonic agent, WIN 47203, in patients with severe congestive heart failure.
No full textThe hemodynamic and clinical effects of WIN 47203, a newly synthesized noncatecholamine, nonglycosidic inotropic agent, were studied in 11 patients with severe chronic congestive heart failure. Intravenous WIN 47203 increased cardiac index from 1.93 +/- 0.36 to 2.87 +/- 0.45 l/min/m2 (p less than 0.001) and reduced pulmonary capillary wedge pressure from 27.0 +/- 8.4 to 16.3 +/- 6.1 mm Hg (p less than 0.001). Mean systemic arterial pressure decreased from 75.2 +/- 6.7 to 72.4 +/- 6.3 mm Hg (p less than 0.01) and systemic vascular resistance from 1591 +/- 397 to 1071 +/- 293 dyn-sec-cm5 (p less than 0.001); heart rate was unchanged. Oral WIN 47203 produced similar hemodynamic improvement. Hemodynamic monitoring of six consecutive doses did not demonstrate evidence for attenuation of effectiveness. Chronic therapy with WIN 47203 produced substantial symptomatic improvement and increased maximal oxygen uptake at 1 week. Patients were further improved after 4 weeks of WIN 47203, and maximal oxygen uptake increased from 9.0 +/- 1.9 to 11.6 +/- 2.5 ml/kg/min (p less than 0.01 vs control). No overt clinical or laboratory manifestations of toxicity were observed. Withdrawal of WIN 47203 in two patients in whom clinical benefit was not sustained resulted in clinical and hemodynamic deterioration, which was reversed by reinstitution of the drug. Therefore, this study demonstrates the acute and sustained cardiotonic efficacy of WIN 47203 in man. If long-term administration remains well tolerated and without side effects, this drug appears to be very promising for treatment of chronic severe congestive heart failure.</jats:p
Turning on the taps: Singapore's new branding as a global hydrohub
No full textIn our globalised and urbanised world, environmental sustainability looms large. Water in particular is a valuable global and cosmopolitan resource that all megacities need. However, rather than cooperating to address these shared challenges, urban scholarship on branding thus far has focused on intercity competition to attract capital flows. This paper argues that an overlooked collaborative dimension of city branding in providing water solutions is important in international cooperation on environmental and climate challenges. It examines Singapore's global hydrohub strategy, and framing the case within branding literature, the paper adopts Anholt's three-pronged conceptual framework of substance, strategy and symbolism. The third 'S' - Symbolism - appears most relevant for the city-state leveraging global concerns over water to project its cooperative win-win approach. While Singapore's original intention was to address 'life and death' challenges securing water supplies from Malaysia, the hydrohub strategy also mirrors the changing geopolitics of regional water politics.1
Preparation and Gas Sensitive Electrical Characteristics of Cobalt Doped Nickel Ferrites
No full textCobalt Doped Nickel ferrites with the general formula Ni1-xCoxFe2O4 (x = 0.0, 0.1 and 0.2)
were prepared by self-combustion method. The combustion powders were heat-treated at
1000°C for 30 min. Structure of the samples were investigated by X-ray powder diffraction
(XRD). XRD patterns were collected in the diffraction angle range 10° - 70°. The gas sensitive
electrical resistances of the as-prepared sample pellets were observed in acetone. It was
observed that the gas sensitivity depends on the concentration of Co
Synthesis and Characterization of LaMnO3Nanofibers by Electrospinning Techique
No full textThis paper aimed to prepare the synthesis of LaMnO3 nanofibers by electrospinning technique using a
solution that contained polyvinyl alcohol (PVA) and a sol-gel solution of LaMnO3. LaMnO3/PVA perovskite-type
nanofibers were obtained after annealed at 500°C, 600°C, 700°C and 800°C for 2h respectively. Thermal properties
of LaMnO3 samples were examined by TG-DTA. Phase formation and crystal structure of LaMnO3 nanopowders
were characterized by X-ray diffraction (XRD). FESEM images revealed that LaMnO3 as-spun nanofibers on Al
foils were attracted to be between 60-120 nm in diameters with electrospinning set-up for 15 min. The crystal
structure, fiber diameters and morphology of LaMnO3 nanofibers were influenced by the calcination temperatures.
The qualifications of LaMnO3 nanofibers were successfully yielded by the electronspinning technique as final
products
Win Prediction in Multiplayer Esports:Live Professional Match Prediction
No full textEsports are competitive videogames watched by audiences. Most esports generate detailed data for each match that are publicly available. Esports analytics research is focused on predicting match outcomes. Previous research has emphasized prematch prediction and used data from amateur games, which are more easily available than those from professional level. However, the commercial value of win prediction exists at the professional level. Furthermore, predicting real-time data is unexplored, as is its potential for informing audiences. Here, we present the first comprehensive case study on live win prediction in a professional esport. We provide a literature review for win prediction in a multiplayer online battle arena (MOBA) esport. This article evaluates the first professional-level prediction models for live DotA 2 matches, one of the most popular MOBA games, and trials it at a major international esports tournament. Using standard machine learning models, feature engineering and optimization, our model is up to 85% accurate after 5 min of gameplay. Our analyses highlight the need for algorithm evaluation and optimization. Finally, we present implications for the esports/game analytics domains, describe commercial opportunities and practical challenges, and propose a set of evaluation criteria for research on esports win prediction.</p
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