Pool boiling of resin-impregnated motor windings geometry

More effective cooling strategies enable lighter and more power dense electrical machines to be developed. Pool boiling using the fluorocarbon Novec 7000 was generated on copper surfaces, both flat and modified to reflect the geometry of resin-impregnated windings of an electrical machine. Four experimental surfaces were exposed to the fluorocarbon in the nucleate pool boiling regime. The motor windings geometry (MWG) surfaces displayed an improved heat transfer coefficient compared to the flat surfaces due to a longer contact line between the heated surface and the vapour during bubble development. An MWG surface was also tested at orientations from 0° (horizontally-upward) to 90°, which did not significantly affect heat transfer; while the 128° orientation gave higher heat transfer coefficients at low heat fluxes, and lower heat transfer coefficients at high heat fluxes. The 180° orientation produced an immediate boiling crisis. The flat plate experimental data was evaluated and compared with the predictions of the Borishanskii and Mostinski, Gorenflo-Kenning, Kruzhilin, Kutateladze, Labuntsov, Leiner, Rohsenow, and Stephan-Abdelsalam nucleate boiling correlations, with the Rohsenow and Labuntsov models showing best agreement with data

Pool boiling of resin-impregnated motor windings geometry

More effective cooling strategies enable lighter and more power dense electrical machines to be developed. Pool boiling using the fluorocarbon Novec 7000 was generated on copper surfaces, both flat and modified to reflect the geometry of resin-impregnated windings of an electrical machine. Four experimental surfaces were exposed to the fluorocarbon in the nucleate pool boiling regime. The motor windings geometry (MWG) surfaces displayed an improved heat transfer coefficient compared to the flat surfaces due to a longer contact line between the heated surface and the vapour during bubble development. An MWG surface was also tested at orientations from 0° (horizontally-upward) to 90°, which did not significantly affect heat transfer; while the 128° orientation gave higher heat transfer coefficients at low heat fluxes, and lower heat transfer coefficients at high heat fluxes. The 180° orientation produced an immediate boiling crisis. The flat plate experimental data was evaluated and compared with the predictions of the Borishanskii and Mostinski, Gorenflo-Kenning, Kruzhilin, Kutateladze, Labuntsov, Leiner, Rohsenow, and Stephan-Abdelsalam nucleate boiling correlations, with the Rohsenow and Labuntsov models showing best agreement with data

Author-Driven Approaches to Computational Narrative Design for Games

Accessible Head Mounted Displays (HMD) have provided mass access to Extended Reality (XR) content as never before. One of the key complaints from HMD owners, however, is the lack of substantial high-quality content (Moore 2017). Coupled with the domain-specific topic of presence, which describes a state beyond the concept of immersion instead with the user feeling part of the virtual world. Utilizing traditional production techniques cost and the duration of the resultant product are inextricably linked, although some progress reducing manual hours has been made with the introduction of Procedural Content Generation (PCG); the focus of this shift has been on asset creation rather than narratives (Kapadia et al. 2017). While PCG can reduce the cost of production it does not however directly increase the duration of the game. The current solution from developers has been to implement game mechanics to increase the duration of the game, leading to a rise in arcade-style wave shooters (Anon 2018), however, this solution is not applicable to long-form content such as narrative-based Role Playing Games (RPG), story-based first-person action games and interactive narratives. The intended contribution of this paper is both to describe the challenges to the academic knowledge in procedurally generated content and computational narratives but is also about studying how those approaches can be democratized, enabling wider adoption within the content creation community, with a view to their eventual use within non-entertainment sectors.Final Accepted Versio

Implante de filtro em veia cava inferior dupla: relato de caso e revisão da literatura Filter placement in duplicated inferior vena cava: case report and review of the literature

Veia cava inferior dupla é uma variação anatômica rara cuja prevalência é de 0,2-3%. O implante de filtro de veia cava, quando indicado em casos com duplicidade da veia cava inferior, pode ser realizado de diferentes formas: em ambas as veias cavas; em uma delas, embolizando a anastomose entre ambas; em somente uma delas; ou por implante supra-renal. Relatamos um caso de trombose venosa profunda no pós-operatório de implante de prótese de quadril com contra-indicação para tratamento anticoagulante e cuja cavografia evidenciou duplicidade de veia cava inferior. O implante de filtro de veia cava inferior realizado em posição supra-renal mostrou-se opção adequada e segura.<br>Double inferior vena cava is a rare anatomic variation with prevalence ranging between 0.2-3.0%. In cases of duplication, inferior vena cava filter placement options include placing it in both vena cava, coil-embolization of the intervenous segment plus placing a filter in the right inferior vena cava, or suprarenal filter placement. We report a case of deep venous thrombosis after unilateral primary total hip replacement, presenting with contraindications for anticoagulant therapy, in which cavography showed inferior vena cava duplication. Inferior vena cava filter placement was performed in the supra-renal portion and was proved to be an adequate and safe procedure