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16 results on '"Nazar B."'

1. Numerical modelling of direct-injection gasoline fuel sprays

Author

Abdelkarim, Nazar B. H.

Subjects
629.253
Abstract

This thesis presents a numerical study of the break-up and atomisation of gasoline fuel sprays injected into atmospheric flow conditions and environments related to combustion chamber conditions. Calculations of the fuel break-up process were achieved by four different models: Taylor Analogy Break-up (TAB), the wave instability theory (WAVE), the Hybrid Sheet-TAB and the Hybrid WAVE-FIPA models. The TAB model relates the break-up process to the droplet oscillations; whereas the WAVE models calculate the fuel break-up from the unstable waves on the droplet surface. The modified version of the TAB model, called the Hybrid Sheet-TAB model delays the start of the break-up further downstream from the nozzle tip. A new hybrid model, the WAVE-FIPA model, divides the spray atomisation processes into a primary stage, where the WAVE model is used, and a secondary stage, which is simulated using experimental correlations to calculate the break-up time for the low Weber number droplets.

Published
2005

2. MortalitY in caRdIAc surgery (MYRIAD): A randomizeD controlled trial of volatile anesthetics. Rationale and design

Author

Landoni, G, Lomivorotov, V, Pisano, A, Nigro Neto, C, Benedetto, U, Biondi Zoccai, G, Gemma, M, Frassoni, S, Agro, F, Baiocchi, M, Barbosa Gomes Galas, F, Bautin, A, Bradic, N, Carollo, C, Crescenzi, G, Elnakera, A, El-Tahan, M, Fominskiy, E, Farag, A, Gazivoda, G, Gianni, S, Grigoryev, E, Guarracino, F, Hanafi, S, Huang, W, Kunst, G, Kunstyr, J, Lei, C, Lembo, R, Li, Z, Likhvantsev, V, Lozovskiy, A, Ma, J, Monaco, F, Navalesi, P, Nazar, B, Pasyuga, V, Porteri, E, Royse, C, Ruggeri, L, Riha, H, Santos Silva, F, Severi, L, Shmyrev, V, Uvaliev, N, Wang, C, Winterton, D, Yong, C, Yu, J, Bellomo, R, Zangrillo, A, Landoni G., Lomivorotov V., Pisano A., Nigro Neto C., Benedetto U., Biondi Zoccai G., Gemma M., Frassoni S., Agro F. E., Baiocchi M., Barbosa Gomes Galas F. R., Bautin A., Bradic N., Carollo C., Crescenzi G., Elnakera A. M., El-Tahan M. R., Fominskiy E., Farag A. G., Gazivoda G., Gianni S., Grigoryev E., Guarracino F., Hanafi S., Huang W., Kunst G., Kunstyr J., Lei C., Lembo R., Li Z. -J., Likhvantsev V., Lozovskiy A., Ma J., Monaco F., Navalesi P., Nazar B., Pasyuga V., Porteri E., Royse C., Ruggeri L., Riha H., Santos Silva F., Severi L., Shmyrev V., Uvaliev N., Wang C. B., Wang C. -Y., Winterton D., Yong C. -Y., Yu J., Bellomo R., Zangrillo A., Landoni, G, Lomivorotov, V, Pisano, A, Nigro Neto, C, Benedetto, U, Biondi Zoccai, G, Gemma, M, Frassoni, S, Agro, F, Baiocchi, M, Barbosa Gomes Galas, F, Bautin, A, Bradic, N, Carollo, C, Crescenzi, G, Elnakera, A, El-Tahan, M, Fominskiy, E, Farag, A, Gazivoda, G, Gianni, S, Grigoryev, E, Guarracino, F, Hanafi, S, Huang, W, Kunst, G, Kunstyr, J, Lei, C, Lembo, R, Li, Z, Likhvantsev, V, Lozovskiy, A, Ma, J, Monaco, F, Navalesi, P, Nazar, B, Pasyuga, V, Porteri, E, Royse, C, Ruggeri, L, Riha, H, Santos Silva, F, Severi, L, Shmyrev, V, Uvaliev, N, Wang, C, Winterton, D, Yong, C, Yu, J, Bellomo, R, Zangrillo, A, Landoni G., Lomivorotov V., Pisano A., Nigro Neto C., Benedetto U., Biondi Zoccai G., Gemma M., Frassoni S., Agro F. E., Baiocchi M., Barbosa Gomes Galas F. R., Bautin A., Bradic N., Carollo C., Crescenzi G., Elnakera A. M., El-Tahan M. R., Fominskiy E., Farag A. G., Gazivoda G., Gianni S., Grigoryev E., Guarracino F., Hanafi S., Huang W., Kunst G., Kunstyr J., Lei C., Lembo R., Li Z. -J., Likhvantsev V., Lozovskiy A., Ma J., Monaco F., Navalesi P., Nazar B., Pasyuga V., Porteri E., Royse C., Ruggeri L., Riha H., Santos Silva F., Severi L., Shmyrev V., Uvaliev N., Wang C. B., Wang C. -Y., Winterton D., Yong C. -Y., Yu J., Bellomo R., and Zangrillo A.

Abstract

Objective There is initial evidence that the use of volatile anesthetics can reduce the postoperative release of cardiac troponin I, the need for inotropic support, and the number of patients requiring prolonged hospitalization following coronary artery bypass graft (CABG) surgery. Nevertheless, small randomized controlled trials have failed to demonstrate a survival advantage. Thus, whether volatile anesthetics improve the postoperative outcome of cardiac surgical patients remains uncertain. An adequately powered randomized controlled trial appears desirable. Design Single blinded, international, multicenter randomized controlled trial with 1:1 allocation ratio. Setting Tertiary and University hospitals. Interventions Patients (n = 10,600) undergoing coronary artery bypass graft will be randomized to receive either volatile anesthetic as part of the anesthetic plan, or total intravenous anesthesia. Measurements and main results The primary end point of the study will be one-year mortality (any cause). Secondary endpoints will be 30-day mortality; 30-day death or non-fatal myocardial infarction (composite endpoint); cardiac mortality at 30 day and at one year; incidence of hospital re-admission during the one year follow-up period and duration of intensive care unit, and hospital stay. The sample size is based on the hypothesis that volatile anesthetics will reduce 1-year unadjusted mortality from 3% to 2%, using a two-sided alpha error of 0.05, and a power of 0.9. Conclusions The trial will determine whether the simple intervention of adding a volatile anesthetic, an intervention that can be implemented by all anesthesiologists, can improve one-year survival in patients undergoing coronary artery bypass graft surgery.

Published
2017

13. Malaysia's Experience in War Against Communist Insurgency and Its Relevance to the Present Situation in Iraq

Author

MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA, Talib, Nazar B., MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA, and Talib, Nazar B.

Abstract

The purpose of this paper is to analyze the British Administration's and, later, the Malaysian Government's strategies in fighting the Malayan Communist Party (MCP). The British spent almost 12 years fighting the communist insurgency, and later the Malaysian Government needed another 29 years to bring the Malayan Communist Party to agree to lay down their arms. The Briggs Plan had a significant impact on the suppression of the communist insurgency at the initial stages. However, it is important to understand that the government's long-term strategy, which focused on security and development, is what finally defeated the insurgency movement in Malaysia. This paper focuses on the 41 years of Malaysian experiences and compares them with the situation in Iraq today. Even though the situation in Malaya was comparatively different in terms of the aims of the insurgents, the reasons for the insurgency, and the category of persons involved, one can learn from the dissimilarities between Malaya and Iraq to gain a better understanding of how war against insurgents should be fought.

Published
2005

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