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Psychology of Game Design: Intrinsic and Extrinsic Rewards
Get PDFIn this paper, I take an overview of the convergence between psychology and game design, particularly the use of intrinsic and extrinsic rewards in game design
Comparison of the Curing Kinetics of the RTM6 Epoxy Resin System Using Differential Scanning Calorimetry and a Microwave-Heated Calorimeter
No full textThe cure of a commercial epoxy resin system, RTM6, was investigated using a conventional differential scanning calorimeter and a microwave-heated calorimeter. Two curing methods, dynamic and isothermal, were carried out and the degree of cure and the reaction rates were compared. Several kinetics models ranging from a simple nth order model to more complicated models comprising nth order and autocatalytic kinetics models were used to describe the curing processes.
The results showed that the resin cured isothermally showed similar cure times and final degree of cure using both conventional and microwave heating methods, suggesting similar curing mechanisms using both heating methods. The dynamic curing data were, however, different using two heating methods, possibly suggesting different curing mechanisms. Near-infrared spectroscopy showed that in the dynamic curing of RTM6 using microwave heating, the epoxy-amine reaction proceeded more rapidly than did the epoxy-hydroxyl reaction.
This was not the case during conventional curing of this resin
Agreed Syllabuses
No full textThis chapter describes the historical process by which agreed syllabuses in religious education in England and Wales were set up and how these syllabuses have since functioned
Formation of chitosan nanoparticles to encapsulate krill oil (Euphausia superba) for application as a dietary supplement
Get PDFEncapsulation of krill oil (KO), a rich source of eicosapentanoic (EPA) and docosahexanoic acid (DHA) was carried out in chitosan-TPP (tripolyphosphate) nanoparticles using a newly developed two-step process (i.e, formation of emulsion and later electrostatic interaction of chitosan with TPP). The encapsulation of KO in chitosan nanoparticles (CSNPs) was confirmed by using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Thermo gravimetric analysis (TGA) techniques. Loading capacity (LC) and encapsulation efficiency (EE) of the obtained particles were about 9 – 25 and 33 – 59 % respectively, when the initial KO content was in the ratio of 0.25 – 1.25 g/g of Chitosan. Bulk KO showed less protection to oxidation and showed more formation of hydroperoxides during first week as noted by FTIR. However, KO loaded CSNPs showed better prevention of KO towards oxidation with less hydroperoxide formation even after two weeks of storage at elevated temperature (45 oC). The obtained KO-loaded CSNPs were irregular in shape with an average particle diameter of < 130 nm as observed by SEM. The results obtained confirmed the suitability of the emulsion and later electrostatic interaction of CS with TPP for the formation of KO loaded CSNPs with greater EE & LC, which will enhance their usage in the Food and Pharmaceutical industrie
Gum karaya (Sterculia urens) stabilized zero-valent iron nanoparticles: characterization and applications for the removal of chromium and volatile organic pollutants from water
Get PDFThis paper illustrates a method for the stabilization of nanoscale zerovalent iron (NZVI) suspensions with a “green” biopolymer, Gum Karaya (GK). The stability, sedimentation, aggregation behavior and reactivity towards Cr(VI) and volatile organic compounds using NZVI–GK (GK stabilized NZVI) and bare NZVI, were assessed. The stabilization mechanism of NZVI–GK was demonstrated using ATR-FTIR, XRD, XPS, TEM, SEM, TGA and particle size analysis. The NZVI–GK nanoparticle suspension was found to be stable for at least three months, suggesting a superior stability rendering property of GK which forms a scaffold to prevent NZVI from aggregating. Batch experiments, centred on Cr(VI) reduction and degradation of volatile organic compounds, confirmed that NZVI–GK was more reactive than bare NZVI. Furthermore, XPS and ICP-MS results revealed that Cr(VI) was reduced to Cr(III) by NZVI–GK and the remaining Cr(III) in solution was adsorbed onto GK, thereby completely removing chromium from the contaminated water. Our study suggests that an important role is played due to the attributes of GK (which include non-toxicity, biodegradability and cost-effectiveness) in conjunction with the ability of NZVI to remove all chromium viz. [Cr(VI) and Cr(III)] coupled with the total degradation and removal of VOCs (cis-1,2-dichloroethene, perchloroethene and trichloroethene) from water
Disclosing ambivalence: contouring, uncertainty and the paradox of escapology
Get PDFThis paper contextualizes two iterations of art practice performed in 2014 by Shepley (i) in the ruined catholic seminary St Peters, Kilmahew, Scotland and (ii) Connaught Place, Delhi, India. The paper examines ways in which he has sought to prolong the notion of artistic activity within the field of distribution and his efforts to disclose potential breaches in the cultural infrastructure emerging through dispersed and uncertain practices. These selected micro-encounters extend the provocation put forward by the Raqs Media Collective during INSERT2014 in Delhi. They are part of his broader practice research highlighting the potential of creative indeterminacy to, push away from ‘art’ and to restore an embodied relationship to the world. The paper explores creative work that attempts, as Marcel Duchamp once wrote, to be not of art, and to delay closure – that closure being the co-opting of art by the institutions that define art as art and that have traditionally distributed it
Aerospace composite cured by quickstep and autoclave processing techniques: Evaluation and comparison of reaction progress
Get PDFQuickstep is relatively a new technique for aerospace composite processing. Thermoset resins (prepregs) have been frequently designed by autoclave method requiring low ramp rate curing of 2–3 K min−1. However, ramp rate up to 15 K min−1 has been achieved via Quickstep processing. This technique allows alteration in chemo-rheology of resin system and so influences the reaction progress. In this attempt, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and dynamic mechanical thermal analysis (DMTA) were used to monitor the cure progress of 977-2A epoxy resin and carbon fiber reinforced composite. The curing reaction progress of 977-2A epoxy/carbon fiber was considered for the first time by comparing Quickstep processing and autoclave method. According to DSC results, the reaction progress in Quickstep technique was comparable to that of autoclave curing. Moreover, DMTA of Quickstep cured samples showed increase in glass transition temperature (Tg) due to increased cross-linking density at greater hold time (upper cure temperature). FTIR was used to monitor the conversion of representative functional groups versus applied Quickstep and autoclave curing steps. The structural analysis depicted that the Quickstep curing path for 977-2A resin was different than the autoclave curing; however the final cross-linked structure was similar to that of autoclave cured samples
You and I are discontinuous beings
Get PDFDrawing practice is the research area producing this output: 'Untitled, Essai' (embroidered shadow drawing) calico, grey thread, wooden frame) 600mm (h) 300mm (w) 35mm (d)
Statement from exhibition:
In this piece, the first of a new series of drawings or essais, I am using the embroidered stitch as a way of tracing a faint line made from a drawing of an already transient and fleeting subject matter – that of shadows and reflected light playing on the walls of the room in which I sit. Reinforcing the line as it reverberates within the room is akin to the reverberations of sounds. Much the same as the room in which you are standing now. The ephemeral play of light is contrasted with the quiet intent of labour
Numerical simulation of non-Newtonian polymer film flow on a rotating spoked annulus
Get PDFThe current study presents results from a series of numerical analyses of non-Newtonian liquid film formation on a rotating spoked annulus. The film flow of a common type of polyester, poly(ethylene terephthalate) (PET), on a vertically rotating disk was modeled numerically. Two different molecular weights, corresponding to different viscosities for PET, and under flow at different rotating speeds, were considered. The film thickness profile was obtained at different radial and angular positions of the rotating disk in the simulations, which is beneficial in calculating the volume of polymer taken up by the rotating disk and also in calculating the volumetric flow rates on the disk. Two types of disks, including a standard solid disk and a number of hollow disk designs with spoked annuli, were considered, and the film flow was modeled using a volume of fluid computational fluid dynamics analysis. The analyses of flow over spoked annulus designs highlighted the advantage of such designs over the use of a conventional solid disk. It was found that the variation in the film thickness for the spoked annulus was lower than that for the conventional solid disk. The parametric study also provided a favorable spoked annulus design for which the film thickness was essentially constant. A constant film thickness would provide a constant film flow, which can be a benefit to many industrial applications
Topology optimisation of wireless sensor networks
Get PDFWireless sensor networks are widely used in a variety of fields including industrial environments. In case of a clustered network the location of cluster head affects the reliability of the network operation. Finding of the optimum location of the cluster head, therefore, is critical for the design of a network. This paper discusses the optimisation approach, based on the brute force algorithm, in the context of topology optimisation of a cluster structure centralised wireless sensor network. Two examples are given to verify the approach that demonstrate the implementation of the brute force algorithm to find an optimum location of the cluster head