Browsing Aerospace, Mechanical & Electronic Engineering ITC by Issue Date

Now showing items 1-20 of 36

    • A game assessment metric for the online gamer 

      Denieffe, David; Carrig, Brian; Marshall, Damien; Picovici, Dorel (Faculty of Electrical Engineering and Computer Science - Stefan cel Mare University of Suceava, Romania, 2007)
      This paper describes a new game assessment metric for the online gamer. The metric is based on a mathematical model currently used for network planning assessment. Beside the traditional network-based parameters such as ...

    • Virtual lab for wireless sensor networks 

      Picovici, Dorel; Contiu, Anghel Vasile; Topa, Adina; Nelson, John (Faculty of Electrical Engineering and Computer Science - Stefan cel Mare University of Suceava, Romania, 2008)
      This article details an experimental system developed to enhance the education and research in the area of wireless networks technologies. The system referred, as Virtual Lab (VL) is primarily targeting first time users ...

    • A new optical method of continuously analysing the surface properties of a single pendant drop while obtaining quality bulk spectral and refractive index measurements of the liquid-under-test 

      McMillan, Norman D.; O'Rourke, B.; Morrin, D.; Pringuet, P.; Smith, S.R.P.; O'Neill, M.; Hammond, J.; Riedel, S.; Carbery, Des (IOP Publishing, 2009)
      The classical stalagmometer has been replaced by the tensiometer to measure surface properties from drop volume. From the drop period T1, converted into volume, the surface properties of the liquid can be obtained. In the ...

    • Fundamental limits of measurement in telecommunications: Experimental and modeling studies in a test optical network on proposal for the reform of telecommunication quantitations 

      Egan, James; McMillan, Norman D.; Denieffe, David (IOP Publishing, 2011)
      Proposals for a review of the limits of measurement for telecommunications are made. The measures are based on adapting work from the area of chemical metrology for the field of telecommunications. Currie has introduced ...

    • RAST model: Simulation of tensiotraces to facilitate drophad engineering 

      Pringuet, P.; McMillan, Norman D.; Doyle, Greg; Smith, S.R.P.; O'Neill, M.; Riedel, S. (IOP Publishing, 2011)
      Tensiography is a technique that determines the physical and chemical properties of a liquid by illuminating a growing pendant drop from within using a source fibre. Light reflected internally at the surface of the drop ...

    • Experimental observations with ultra-speed imaging revealing new complex detail of drop separation processes from a large diameter drophead 

      Carbery, Des; McMillan, Norman D.; O'Neill, M.; Riedel, S.; Kennedy, D.; Nicholls, T. (IOP Publishing, 2011)
      An ultraspeed (5000 frames a second) camera has been used to record the drop separating from the photometric instrument the tensiograph. New insights into drop separation processes which have been evaluated in terms of the ...

    • Commencement measurements giving fundamental surface tension determinations in tensiometry 

      Carbery, Des; McMillan, Norman D.; Morrin, D.; O'Neill, M.; O'Rourke, B.; Pringuet, P.; Riedel, S.; Smith, S.R.P. (IOP Publishing, 2011)
      This study provides experimental testing of a ray-tracing model of the tensiotrace that explores the measurement potential of a well-defined optical position in the tensiotrace signal known as the 'commencement'. This point ...

    • The impact of thermal degradation on properties of electrical machine winding insulation material 

      Sumislawska, Malgorzata; Gyftakis, Konstantinos N; Kavanagh, Darren F.; McCulloch, Malcolm D.; Burnham, Keith J.; Howey, David A. (IEEE, 2016)
      Interturn stator short circuits can develop quickly leading to serious damage of an electric machine. However, degradation mechanisms of winding insulation material are not yet fully understood. Therefore, the main ...

    • QUBIC : exploring the primordial universe with the q&u bolometric interferometer 

      Mennella, Aniello; Ade, Peter; Amico, Giorgio; Auguste, Didier; Aumont, Jonathan; Banfi, Stephano; Barbarán, Gustavo; Battaglia, Paola; Battistelli, Elia; Bau, Alessandro; Bélier, Benoit; Bennett, David G.; Bergé, Laurent; Bernard, Jean Philippe; Bersanelli, Marco; Bigot Sazy, Marie Anne; Bleurvacq, Nathan; Bonaparte, Juan; Bonis, Julien; Bunn, Emory; Burke, David; Buzi, Daniele; Buzzelli, Alessandro; Cavaliere, Francesco; Chanial, Pierre; Chapron, Claude; Charlassier, Romain; Columbro, Fabio; Coppi, Gabriele; Coppolecchia, Alessandro; D'Agostino, Rocco; D'Alessandro, Giuseppe; De Bernardis, Paolo; De Gasperis, Giancarlo; De Leo, Michele; De Petris, Marco; Di Donato, Andres; Dumoulin, Louis; Etchegoyen, Alberto; Fasciszewski, Adrián; Franceschet, Cristian; Gamboa Lerena, Martin Miguel; Garcia, Beatriz; Garrido, Xavier; Gaspard, Michel; Gault, Amanda; Gayer, Donnacha; Gervasi, Massimo; Giard, Martin; Giraud Héraud, Yannick; Gómez Berisso, Mariano; González, Manuel; Gradziel, Marcin; Grandsire, Laurent; Guerard, Eric; Hamilton, Jean Christophe; Harari, Diego; Haynes, Vic; Henrot Versillé, Sophie; Hoang, Duc Thuong; Holtzer, Nicolas; Incardona, Federico; Jules, Eric; Kaplan, Jean; Korotkov, Andrei; Kristukat, Christian; Lamagna, Luca; Loucatos, Sotiris; Louis, Thibaut; Lowitz, Amy; Lukovic, Vladimir; Luterstein, Raúl Horacio; Maffei, Bruno; Marnieros, Stefanos; Masi, Silvia; Mattei, Angelo; May, Andrew; McCulloch, Mark; Medina, Maria Clementina; Mele, Lorenzo; Melhuish, Simon J.; Montier, Ludovic; Mousset, Louise; Mundo, Luis Mariano; Murphy, John Anthony; Murphy, James David; O'Sullivan, Creidhe; Olivieri, Emiliano; Paiella, Alessandro; Pajot, Francois; Passerini, Andrea; Pastoriza, Hernan; Pelosi, Alessandro; Perbost, Camille; Perciballi, Maurizio; Pezzotta, Federico; Piacentini, Francesco; Piat, Michel; Piccirillo, Lucio; Pisano, Giampaolo; Polenta, Gianluca; Prele, Damien; Puddu, Roberto; Rambaud, Damien; Ringegni, Pablo; Romero, Gustavo E.; Salatino, Maria; Schillaci, Alessandro; Scóccola, Claudia G.; Scully, Stephen P.; Spinelli, Sebastiano; Stankowiak, Guillaume; Stolpovskiy, Michail; Suarez, Federico; Tartari, Andrea; Thermeau, Jean Pierre; Timbie, Peter; Tomasi, Maurizio; Torchinsky, Steve A.; Tristram, Matthieu; Tucker, Carole E.; Tucker, Gregory S.; Vanneste, Sylvain; Viganó, Daniele; Vittorio, Nicola; Voisin, Fabrice; Watson, Robert; Wicek, Francois; Zannoni, Mario; Zullo, Antonio (MDPI, 2019-01-23)
      In this paper, we describe QUBIC, an experiment that will observe the polarized microwave sky with a novel approach, which combines the sensitivity of state-of-the-art bolometric detectors with the systematic effects control ...

    • High order mismatch shaping for low oversampling rates. 

      O'Brien, Vincent; Mullane, Brendan (IEEE, 2019-03-11)
      Delta Sigma data converters employing high order dynamic element matching (DEM) allow for accurate signal conversion in the presence of DAC mismatch. However, at low oversampling rates, current high order DEM decoders ...

    • Microfluidics in haemostasis: A review 

      Jigar Panchal, Heta; Kent, Nigel J.; Knox, Andrew J.S.; Harris, Leanne F. (MDPI, 2020)
      Haemostatic disorders are both complex and costly in relation to both their treatment and subsequent management. As leading causes of mortality worldwide, there is an ever-increasing drive to improve the diagnosis and ...

    • The Internet in East Africa: a mixed methods study 

      Ó Briain, Diarmuid; Denieffe, David; Okello, Dorothy; Kavanagh, Yvonne (East African Journal of Science, Technology and Innovation, 2020)
      East Africa was the last major area of the world to gain access to the Internet when submarine fibre-optic cables landed at Mombasa, Kenya and Dar-es-Salaam, Tanzania in 2009. The region previously relied on satellite ...

    • Flow-field and performance study of coaxial supersonic nozzles operating in hypersonic environment 

      Samara, Mohammad Saeed; Vashishtha, Ashish; Watanabe, Yasumasa; Suzuki, Kojiro (Praise Worthy Prize, 2020)
      The integration of multiple propulsion systems in a coaxial configuration is one of the challenges to realize hypersonic passenger transportation. This study is an attempt to understand the performance of two co-axial jets ...

    • Enabling models of Internet eXchange Points for developing contexts 

      Ó Briain, Diarmuid; Denieffe, David; Okello, Dorothy; Kavanagh, Yvonne (Elsevier, 2020-10-24)
      In 2009, fibre-optic cables landed on the East coast of Africa, the last major area of the world to be connected to the Internet triggering a decade of Internet development (Graham et al., 2015). During the same period, ...

    • On unsteady flow analysis of a round spike blunt nose afterbody in mach 6 flow 

      Vashishtha, Ashish; Khurana, Shashank (IOP Publishing Ltd, 2021)
      An aerospike, in front of a blunt body, has largely been deemed as a key passive control device for effectively reducing the wave drag and aerodynamic heating associated with high-speed flows. In addition, it has been ...

    • Drag control by hydrogen injection in shocked stagnation zone of blunt nose 

      Vashishtha, Ashish; Callaghan, Dean; Nolan, Cathal (IOP Publishing, 2021)
      The main motivation of the current study is to propose a high-pressure hydrogen injection as an hybrid active flow control technique in order to manipulate the flow-field in front of a blunt nose during hypersonic flight. ...

    • Numerical investigation of detonation propagation through small orifice holes 

      Vashishtha, Ashish; Callaghan, Dean; Nolan, Cathal; Deiterding, Ralf (Sciendo, 2021)
      Seeking to better understand the physical phenomena underlying detonation wave propagation through small holes (especially the phenomenon of detonation re-initiation or its failure), we investigated the propagation of a ...

    • Effects of freestream disturbances in front of spiked blunt nose at hypersonic flow 

      Vashishtha, Ashish; Khurana, Shashank; Callaghan, Dean; Nolan, Cathal (Council of European Aerospace Societies, 2021)
      The effects of high frequency slow and fast acoustic wave freestream disturbances are modelled in front of pulsating bow shock formed at spiked blunt nose in hypersonic flow. These disturbances are introduced as time-dependent ...

    • Numerical study of an aerospike nozzle in retropropulsion 

      Vashishtha, Ashish; Khurana, Shashank; Callaghan, Dean; Nolan, Cathal (Council of European Aerospace Societies, 2021)
      The primary motivation of this numerical study is to explore the feasibility of drag enhancement using aerospike nozzle for retropropulsion in hypersonic flow. An external expansion contoured aerospike nozzle with design ...

    • Pulsating flow investigation for spiked blunt-nose body in hypersonic flow and its control 

      Vashishtha, Ashish; Khurana, Shashank (American Institute of Aeronautics and Astronautics, 2021-01)
      An aerospike, as a technique for drag reduction and heat transfer in high-speed flows, is associated with instabilities. To understand the pulsating flow behavior in front of forward facing spiked blunt nose, numerical ...