All Outputs (1204)

Monitoring acoustic emission (AE) energy in slurry impingement using a new model for particle impact. (2015)
Journal Article
DROUBI, M.G., REUBEN, R.L. and WHITE, G. 2015. Monitoring acoustic emission (AE) energy in slurry impingement using a new model for particle impact. Mechanical systems and signal processing [online], 62-63, pages 415-430. Available from: https://doi.org/10.1016/j.ymssp.2015.01.023

A series of systematic impact tests have been carried out to investigate the influence of particle size, free stream velocity, particle impact angle, and nominal particle concentration on the amount of energy dissipated in a carbon steel target using... Read More about Monitoring acoustic emission (AE) energy in slurry impingement using a new model for particle impact..

Highly textured and transparent RF sputtered Eu2O3 doped ZnO films. (2015)
Journal Article
SREEDHARAN, R. S., GANESAN, V., SUDARSANAKUMAR, C. P., BHAVSAR, K., PRAHBU, R. and PILLAI, V.P.P.M., 2015. Highly textured and transparent RF sputtered Eu2O3 doped ZnO films. Nano reviews [online], 6, Article 26759. Available from: https://doi.org/10.3402/nano.v6.26759

Background: Zinc oxide (ZnO) is a wide, direct band gap II-VI oxide semiconductor. ZnO has large exciton binding energy at room temperature, and it is a good host material for obtaining visible and infrared emission of various rare-earth ions. Method... Read More about Highly textured and transparent RF sputtered Eu2O3 doped ZnO films..

Solar-hydrogen energy storage for enabling Qatar solar-grid integration and eco-friendly transportation. (2015)
Presentation / Conference
ALI, D., AKLIL, D. and GAZEY, R. 2015. Solar-hydrogen energy storage for enabling Qatar solar-grid integration and eco-friendly transportation. Presented at the 4th TAMUQ (Texas A and M University at Qatar) annual research and industry forum 2015, 2-3 March 2015, Doha, Qatar.

Qatar has drawn up an ambitious plan to install 1.8 GW of solar capacity by 2020. In the transport sector, green hydrogen produced from solar PV offers one of the best opportunities to reduce greenhouse gas emissions and significantly reduce depende... Read More about Solar-hydrogen energy storage for enabling Qatar solar-grid integration and eco-friendly transportation..

Drive cycle optimisation for pollution reduction. (2015)
Presentation / Conference
AL-GHADHI, M., BALL, A., KOLLAR, L.E., MISHRA, R. and ASIM, T. 2015. Drive cycle optimisation for pollution reduction. Presented at 2nd International conference on petroleum and petrochemical engineering 2015 (ICPPE 2015), 10-11 January 2015, Dubai, UAE.

Green house gas emissions have abraded environmental quality for human existence. Automobile exhaust is a significant contributor globally to green house gases, among other contributors. This research investigates how vehicle fuel consumption can be... Read More about Drive cycle optimisation for pollution reduction..

The prospect of deepwater heavy oil production using CO2-EOR. (2015)
Journal Article
TCHAMBAK, E., OYENEYIN, B. and OLUYEMI, G. 2015. The prospect of deepwater heavy oil production using CO2-EOR. Energy sources, part A: recovery, utilization and environmental effects [online], 37(3), pages 318-325. Available from: https://doi.org/10.1080/15567036.2011.585373

The prospect of unconventional oil development has long been coming to offset the rapid decline of conventional crude. And looking ahead, the worry is already turning away from the onshore exploitation to the challenging offshore environment, with th... Read More about The prospect of deepwater heavy oil production using CO2-EOR..

Angular dependent light emission from planar waveguides. (2015)
Journal Article
PETER, J., PRABHU, R., RADHAKRISHNAN, P., VALLABHAN, C.P.G., NAMPOORI, V.P.N. and KAILASNATH, M. 2015. Angular dependent light emission from planar waveguides. Journal of applied physics, 117(1), Article 015301. Available from: https://doi.org/10.1063/1.4905011

We have investigated the angular dependence of amplified spontaneous emission (ASE) and laser emission from an asymmetric and free-standing polymer thin films doped with rhodamine 6G, which is transversely pumped by a pulsed Nd:YAG laser. A semi-leak... Read More about Angular dependent light emission from planar waveguides..

Suppressing stick-slip oscillations in underactuated multibody drill-strings with parametric uncertainties using sliding-mode control. (2015)
Journal Article
LIU, Y. 2015. Suppressing stick-slip oscillations in underactuated multibody drill-strings with parametric uncertainties using sliding-mode control. IET control theory and applications [online], 9(1), pages 91-102. Available from: https://doi.org/10.1049/iet-cta.2014.0329

Stabilisation of multibody drill-strings which exhibit stick-slip oscillations is studied in this paper from the point of view of underactuated system. The model has one control torque input acting on the rotary table from the land surface and multi-... Read More about Suppressing stick-slip oscillations in underactuated multibody drill-strings with parametric uncertainties using sliding-mode control..

Structure, strength and defect characterisation of cement based materials. (2014)
Thesis
CHOUDHURY, A.H. 2014. Structure, strength and defect characterisation of cement based materials. Robert Gordon University, PhD thesis.

In cement based systems, the residual stresses are created by internal expansion. This provides toughening by the release of the residual stresses as the macro-crack propagates. While circumstantial evidence of the residual stresses exist (e.g. micro... Read More about Structure, strength and defect characterisation of cement based materials..

Innovative cyclical development of the Russian pipeline system. (2014)
Conference Proceeding
KURUSHINA, V. and ZEMENKOV, Y. 2014. Innovative cyclical development of the Russian pipeline system. In Brebbia, C.A., Magaril, E.R. and Khodorovsky, M.Y. (eds.) Energy production and management in the 21st century: the quest for sustainable energy: proceedings of the 1st International conference on energy production and management (Energy Quest 2014), 23-25 April 2014, Ekaterinburg, Russia. WIT transactions on ecology and the environment, 190. Southampton: WIT Press [online], pages 881-888. Available from: https://doi.org/10.2495/EQ140822

This paper examines the identification of patterns of innovative development in the Russian pipeline system. An evaluation system based on the theory of technological innovation cycles is proposed. The innovation cycles identification scheme, in term... Read More about Innovative cyclical development of the Russian pipeline system..

Injection behaviour of fractured reservoirs at near wellbore and far field areas: a CFD study. (2014)
Journal Article
OLUYEMI, G.F., KANIN, L. and NAIR, A. 2014. Injection behaviour of fractured reservoirs at near wellbore and far field areas: a CFD study. International journal of fluid mechanics research [online], 41(6), pages 536-546. Available from: https://doi.org/10.1615/InterJFluidMechRes.v41.i6.60

Flow partitioning in fractured reservoirs especially during injection and production operations poses a great challenge to the optimisation of these important field operations. For example, flow partitioning into the fracture from the matrix may limi... Read More about Injection behaviour of fractured reservoirs at near wellbore and far field areas: a CFD study..

FEM analysis to optimally design end mill cutters for milling of Ti-6Al-4V. (2014)
Journal Article
KUMAR, V., EAKAMBARAM, A. and ARIVAZHAGAN, A. 2014. FEM analysis to optimally design end mill cutters for milling of Ti-6Al-4 V. Procedia engineering [online], 97: proceedings of 12th Global congress on manufacturing and management 2014 (GCMM 2014), 8-10 December 2014, Vellore, India, pages 1237-1246. Available from: https://doi.org/10.1016/j.proeng.2014.12.402

This paper presents an FEM analysis conducted for optimally designing end mill cutters through verifying the cutting tool forces and stresses for milling Titanium alloy Ti-6Al-4 V. Initially, the theoretical tool forces are calculated by considering... Read More about FEM analysis to optimally design end mill cutters for milling of Ti-6Al-4V..

Twinning anisotropy of tantalum during nanoindentation. (2014)
Journal Article
GOEL, S., BEAKE, B., CHAN, C.-W., FAISAL, N.H. and DUNNE, N. 2015. Twinning anisotropy of tantalum during nanoindentation. Materials science and engineering: A [online], 627, pages 249-261. Available from: https://doi.org/10.1016/j.msea.2014.12.075

Unlike other BCC metals, the plastic deformation of nanocrystalline Tantalum (Ta) during compression is regulated by deformation twinning. Whether or not this twinning exhibits anisotropy was investigated through simulation of displacement-controlled... Read More about Twinning anisotropy of tantalum during nanoindentation..

Natural convection flow and heat transfer in an enclosure containing staggered arrangement of blockages. (2014)
Journal Article
IYI, D. and HASAN, R. 2015. Natural convection flow and heat transfer in an enclosure containging staggered arragement of blockages. Procedia engineering [online], 105: proceedings of the 6th BSME international conference on thermal engineering (ICTE 2014), 19-21 December 2014, Dhaka, Bangladesh, pages 176-183. Available from: https://doi.org/10.1016/j.proeng.2015.05.033

The work reported in this paper is a numerical study of airflow and heat transfer for low turbulence buoyancy-driven flow in a rectangular cavity partially filled with solid objects. The two vertical walls were maintained at constant temperatures giv... Read More about Natural convection flow and heat transfer in an enclosure containing staggered arrangement of blockages..

Enhanced oil recovery by CO2 injection in carbonate reservoirs. (2014)
Conference Proceeding
HAWEZ, H. and AHMED, Z. 2014. Enhanced oil recovery by CO2 injection in carbonate reservoirs. In Al-Kayiem, H.H., Brebbia, C.A. and Zubir, S.S. (eds.) Energy and sustainability V: proceedings of 5th Energy and sustainability international conference 2014, 16-18 December 2014, Kuala Lumpur, Malaysia. WIT transactions on ecology and the environment, 186. Southampton: WIT Press [online], 547-558. Available from: https://doi.org/10.2495/ESUS140481

The majority of carbonate reservoirs have low porosity and permeability in general because of having a high amount of matrixes that make a heterogeneous reservoir, however high permeable layers are fractured. This study shows the effect of carbon dio... Read More about Enhanced oil recovery by CO2 injection in carbonate reservoirs..

Signal conditioning electronics for UHF partial discharge detection and location system. (2014)
Presentation / Conference
UPTON, D.W., MATHER, P.J., ZHANG, Y., JABER, A., AHMED, H., KHAN, U., SAEED, B., VIEIRA, M.F.Q., ATKINSON, R. and GLOVER, I.A. 2014. Signal conditioning electronics for UHF partial discharge detection and location system. Presented at the 2014 International Union of Radio Science (URSI) Festival of radio science, 16 December 2014, Manchester, UK.

Partial Discharge (PD) occurs in damaged high-voltage insulation. PD results in UHF electromagnetic radiation which can be used to detect and locate insulation faults in HV power systems equipment such as transmission lines and transformers thereby p... Read More about Signal conditioning electronics for UHF partial discharge detection and location system..

Renewable energy potentials in Cameroon: prospects and challenges. (2014)
Journal Article
WIRBA, A.V., MAS'UD, A.A., MUHAMMAD-SUKKI, F., AHMAD, S., TAHAR, R.M., RAHIM, R.A., MUNIR, A.B. and KARIM, M.E. 2015. Renewable energy potentials in Cameroon: prospects and challenges. Renewable energy [online], 76, pages 560-565. Available from: https://doi.org/10.1016/j.renene.2014.11.083

This paper aims at discussing the renewable energy potentials in delivering parts of the energy needs in Cameroon. The country has an enormous renewable energy potential. The lack of clear renewable energy policy in the mix is an issue that needs to... Read More about Renewable energy potentials in Cameroon: prospects and challenges..

Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles. (2014)
Journal Article
IYI, D., HASAN, R. and PENLINGTON, R. 2015. Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles. Numerical heat transfer, part A: applications [online], 67(5), pages 531-546. Available from: https://doi.org/10.1080/10407782.2014.937261

The work reported here is a 2D numerical study on the buoyancy-driven low-speed turbulent flow of humid air inside a rectangular cavity partially filled with solid cylindrical objects for a Rayleigh number of 1.45 × 109. Variations of Nusselt number,... Read More about Effect of emissivity on the heat and mass transfer of humid air in a cavity filled with solid obstacles..

Evolution of economic development aims: assessment of the smart growth. (2014)
Journal Article
KURUSHINA, E.V. and KURUSHINA, V.A. 2014. Evolution of economic development aims: assessment of the smart growth. Life science journal [online], 11(11), pages 517-521. Available from: https://doi.org/10.7537/marslsj111114.88

The paper investigated the global trends of changing aims for evaluating economic development. Approaches to assessing the level of innovation are systematized. Classifications of innovations are given. The approach to the assessment of smart growth... Read More about Evolution of economic development aims: assessment of the smart growth..

Dynamics of rising CO2 bubble plumes in the QICS field experiment: part 2; modelling. (2014)
Journal Article
DEWAR, M., SELLAMI, N. and CHEN, B. 2015. Dynamics of rising CO2 bubble plumes in the QICS field experiment: part 2; modelling. International journal of greenhouse gas control [online], 38, pages 52-63. Available from: https://doi.org/10.1016/j.ijggc.2014.11.003

An oceanic two-phase plume model is developed to include bubble size distribution and bubble interactions, applied to the prediction of CO2 bubble plume and CO2 solution dynamics observed from the recent QICS field experiment in the Scottish sea at A... Read More about Dynamics of rising CO2 bubble plumes in the QICS field experiment: part 2; modelling..

Synthesis of gas transport through nano composite ceramic membrane for esterification and volatile organic compound separations. (2014)
Journal Article
OKON, E., SHEHU, H. and GOBINA, E. 2014. Synthesis of gas transport through nano composite ceramic membrane for esterification and volatile organic compound separations. Journal of mechanics engineering and automation [online], 4(11), pages 905-913. Available from: https://doi.org/10.17265/2161-623X/2014.11.007

The transport behaviour of carrier gases with inorganic catalytic ceramic membrane used for ethyl lactate production and VOC (volatile organic compound) recovery in the gauge pressure range of 0.10-1.00 bar and temperature range of 333 K was investig... Read More about Synthesis of gas transport through nano composite ceramic membrane for esterification and volatile organic compound separations..