338 research outputs found
Mahmoud Darwish, Palestinian national poet
No full textDiplomová práce se zabývá osobou literáta Mahmúda Darwíše. Popisuje jeho život od narození v roce 1948 až po smrt v roce 2008. Zhodnocuje i jeho politické aktivity a vliv, který měl na palestinské obyvatelstvo po celý svůj život. Pojednává i o jeho literární tvorbě, poezii i próze. Práce podává ucelený pohled na život, vliv a dílo tohoto autora, který je považován za palestinského národního básníka.Katedra blízkovýchodních studiíObhájenoThis essay is focused on the person of writer Mahmoud Darwish. It describes his life from birth in 1948 until his death in 2008. Essay evaluates his political activities and influence that Darwish had on the Palestinian people. Also discusses his literary works, poetry and prose. The essay gives a comprehensive view of life, influence and work of this author, who is considered to be the Palestinian national poet
Gender Across Cultures: An Interview with Nonie Darwish
No full textNonie Darwish grew up in Gaza and Cairo. When she was 8 years old her father, a high-ranking military officer, was killed in an act of terrorism, making him a shahid, or martyr for jihad. Darwish came to America when she was 30 and was struck by the freedoms enjoyed in her new country; she has felt compelled to speak out for tolerance since 9/11. She is the author of Now They Call Me Infidel: Why I Renounced Jihad for America, Israel, and the War on Terror and the originator of the group Arabs for Israel (www.arabsforisrael.com). Darwish’s second book, Cruel and Usual Punishment, about the conditions of Muslim women under Sharia (Islamic law), will be published in 2008. Darwish spoke with our editor on February 29, 2008
Development of a novel fully coupled solver in OpenFOAM: Steady-state incompressible turbulent flows
No full textIn this work a block coupled algorithm for the solution of three-dimensional incompressible turbulent flows is presented. A cell-centered finite-volume method for unstructured grids is employed. The interequation coupling of the incompressible Navier-Stokes equations is obtained using a SIMPLE-type algorithm with a Rhie-Chow interpolation technique. Due to the simultaneous solution of momentum and continuity equations, implicit block coupling of pressure and velocity variables leads to faster convergence compared to classical, loosely coupled, segregated algorithms of the SIMPLE family of algorithms. This gain in convergence speed is accompanied by an improvement in numerical robustness. Additionally, a two-equation eddy viscosity turbulence model is solved in a segregated fashion. The substnatially improved performance of the block coupled approach compared to the segregated approach is demonstrated in a set of test cases. It is shown that the scalability of the coupled solution algorithm with increasing numbers of cells is nearly linear. To achieve this scalability, an algebraic multigrid solver for block coupled systems of equations has been implemented and used as linear solver for the system of block equations. The presented algorithm has been entirely embedded into the leading open-source computational fluid dynamics (CFD) library OpenFOAM. © 2014 Taylor and Francis Group, LLC.Benzi M, 2005, ACT NUMERIC, V14, P1, DOI 10.1017-S0962492904000212; Brandt A., 1977, MATH COMPUT; Casartelli E., 2012, INT C EXH INN APPR G; DACLESMARIANI J, 1995, AIAA J, V33, P1561, DOI 10.2514-3.12826; Darwish M., 2001, NUMER HEAT TRANSFE B; Darwish M., 2000, INT J NUMER METH FLU; Darwish M., 2003, INT J HEAT MASS TRAN; Darwish M., 2008, J COMPUT PHYS; Darwish M., 2004, NUMER HEAT TRANSFE B; de Lemos MJS, 2000, NUMER HEAT TR B-FUND, V37, P489; Doormaal J. V., 1986, NAT HEAT TRANSF C DE; Doormaal J. V., 1984, NUMER HEAT TRANSFER; Federenko R., ZH VYCHISL MAT MAT F, P922; Ferziger J., 1994, COMPUTATIONAL METHOD; Hutchinson B., 1986, NUMER HEAT TRANSFER; Keller S., 2004, P 10 BRAZ C THERM SC; Laia Y. G., 1997, NUMER HEAT TRANSFE B, V32, P267; Menter F., 1994, AIAA J; Menter F. R., 2003, TURBULENCE HEAT MASS; Moukalled F., 2000, NUMER HEAT TRANSFE B; Muzaferija S., 1994, THESIS U LONDON LOND; Patankar S., 1972, INT J HEAT MASS TRAN; Patankar S. V., 1980, NUMERICAL HEAT TRANS; Poussin F., 1968, SIAM J NUMER ANAL; Rhie C., 1983, AIAA J; Singh D., 2013, NUMER HEAT TRANSFE A; Vradis C., 1998, NUMERICAL HEAT TRANS, V33, P79; Weller H., 1998, COMPUT PHYS; Woodfield PL, 2003, NUMER HEAT TR B-FUND, V43, P403, DOI 10.1080-104077903901221223
A pressure-based framework for the resolution of multi-fluid flow problems
No full textPressure-based methods represent a class of Computational Fluid Dynamics (CFD) algorithms in which pressure, rather than density, is used as a principal variable. This paper presents a review of segregated pressure-based methods and reports on a newly developed fully coupled method for the solution of multi-fluid flow problems. Results indicate the superiority of the coupled solver over the segregated approach. © 2013 AIP Publishing LLC.CARVER MB, 1984, J FLUID ENG-T ASME, V106, P147; Darwish M., 2009, J COMPUT PHYS, V28, P180; Darwish M., 2011, ICNAAM 2011 HALK GRE; HARLOW FH, 1975, J COMPUT PHYS, V17, P19, DOI 10.1016-0021-9991(75)90061-3; Moukalled F, 2004, NUMER HEAT TR B-FUND, V45, P495, DOI 10.1080-10407790490430651; Moukalled F, 2004, NUMER HEAT TR B-FUND, V45, P523, DOI 10.1080-10407790490437997; Moukalled F., 2001, NUMER HEAT TRANSFE B, V40, P99; Moukalled F., 2006, HDB NUMERICAL HEAT T, P325; RHIE CM, 1983, AIAA J, V21, P1525, DOI 10.2514-3.8284; Spalding D.B, 1976, HTS7611 IMP COLL0
Convective schemes for capturing interfaces of free-surface flows on unstructured grids
No full textIn this article, the general methodology used in constructing interface-capturing schemes is clarified and concisely described. Moreover, a new interface-capturing scheme, denoted STACS and based on a switching strategy, is developed. The accuracy of the new scheme is compared to the well-known CICSAM and HRIC schemes by solving four pure advection test problems. Results, displayed in the form of interface contours for the various schemes, reveal deterioration in the accuracy of the CICSAM and HRIC schemes, with their performance approaching that of the UPWIND scheme as the Courant number increases. On the other hand, predictions obtained with the new STACS scheme are by far more accurate and less diffusive, preserving interface sharpness and boundedness at all Courant number values considered.BRACKBILL JU, 1992, J COMPUT PHYS, V100, P335, DOI 10.1016-0021-9991(92)90240-Y; BRANDT A, 1977, MATH COMPUT, V31, P333; Cleary PW, 2000, INT J CAST METAL RES, V12, P357; Darwish M, 1996, COMPUT METHOD APPL M, V129, P221, DOI 10.1016-0045-7825(95)00881-0; Darwish M, 2001, NUMER HEAT TR B-FUND, V40, P99; Darwish M, 2000, NUMER HEAT TR B-FUND, V37, P227; DARWISH M, 2000, P 36 AIAA ASME SAE A; DARWISH M, 2002, P IASTED INT C APPL; Darwish MS, 1998, NUMER HEAT TR B-FUND, V34, P191, DOI 10.1080-10407799808915054; Darwish MS, 2003, INT J HEAT MASS TRAN, V46, P599, DOI 10.1016-S0017-9310(02)00330-7; DARWISH MS, 1993, NUMER HEAT TR B-FUND, V24, P353, DOI 10.1080-10407799308955898; Ha J., 1999, P 2 INT C CFD MIN PR; HARLOW FH, 1971, LA4700 LASA; Harvie DJE, 2001, INT J NUMER METH FL, V35, P151, DOI 10.1002-1097-0363(20010130)35:2151::AID-FLD873.0.CO;2-4; HIRT CW, 1981, J COMPUT PHYS, V39, P201, DOI 10.1016-0021-9991(81)90145-5; Jasak H, 1996, THESIS TECHNOLOGY ME; Kothe D B, 1999, P 3 ASME JSME JOINT; KOTHE DB, 1992, AIAA J, V30, P2694, DOI 10.2514-3.11286; LAFAURIE B, 1994, J COMPUT PHYS, V113, P134, DOI 10.1006-jcph.1994.1123; LEONARD BP, 1990, COMPUT METH APPL MEC, P59; LEONARD BP, 1991, COMPUT FLUIDS, V19, P141, DOI 10.1016-0045-7930(91)90011-6; LEONARD BP, 1990, INT J NUMER METH ENG, V30, P729, DOI 10.1002-nme.1620300412; LEONARD BP, 1991, COMPUT METHOD APPL M, V88, P17, DOI 10.1016-0045-7825(91)90232-U; Maronnier V, 1999, J COMPUT PHYS, V155, P439, DOI 10.1006-jcph.1999.6346; Darwish M, 2003, INT J NUMER METH FL, V41, P1221, DOI 10.1002-fld.490; MOUKALLED F, 1996, NUMER HEAT TRANSFE B, V31, P91; Moukalled F, 2001, J COMPUT PHYS, V168, P101, DOI 10.1006-jcph.2000.6683; Moukrim A, 2003, RAIRO-OPER RES, V37, P1, DOI 10.1051-ro:2003011; Muzaferija S, 1998, P 22 S NAV HYDR WASH, P638; Muzaferija S, 1998, NONLINEAR WATER WAVE, P59; Nichols B., 1980, LA8355; Nichols B.D., 1975, P 1 INT C NUM SHIP H; Noh W. F., 1976, LECTURE NOTES PHYSIC, V59, P330; OSHER S, 1983, J COMPUT PHYS, V50, P447, DOI 10.1016-0021-9991(83)90106-7; Puckett EG, 1991, P 4 INT S COMP FLUID, P933; RAMSHAW JD, 1976, J COMPUT PHYS, V21, P438, DOI 10.1016-0021-9991(76)90039-5; Renardy Y, 2002, J COMPUT PHYS, V183, P400, DOI 10.1006-jcph.2002.7190; Rhie C.M., 1986, 860207 AIAA; Rider WJ, 1998, J COMPUT PHYS, V141, P112, DOI 10.1006-jcph.1998.5906; RIDER WJ, 1995, P 12 AIAA CFD C SAN; Rudman M, 1997, INT J NUMER METH FL, V24, P671, DOI 10.1002-(SICI)1097-0363(19970415)24:7671::AID-FLD5083.0.CO;2-9; SHYY W, 1988, 883566CP AIAA; SHYY W, 1992, AIAA J, V30, P2660, DOI 10.2514-3.11282; Ubbink O, 1999, J COMPUT PHYS, V153, P26, DOI 10.1006-jcph.1999.6276; UNVERDI SO, 1992, J COMPUT PHYS, V100, P25, DOI 10.1016-0021-9991(92)90307-K; YOUNGS DL, 1984, 449235 AT WEAP RES E; ZALESAK ST, 1979, J COMPUT PHYS, V31, P335, DOI 10.1016-0021-9991(79)90051-223252
THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS SOLVABILITY OF URYSOHN AND URYSOHN-VOLTERRA EQUATIONS WITH HYSTERESIS IN WEIGHTED SPACES
No full textThe existence of solutions to nonlinear integral equations of the second kind with hysteresis, of Urysohn-Volterra and Urysohn types has been established. We develop the solvability theory of Urysohn-Volterra equation with hysteresis in weighted spaces proposed by the author [M.A. Darwish, On solvability of Urysohn-Volterra equations with hysteresis in weighted spaces, J
Performance comparison of the NWF and DC methods for implementing High-Resolution schemes in a fully coupled incompressible flow solver
No full textThis paper reports on the use of the Normalized Weighting Factor (NWF) method and the Deferred Correction (DC) approach for the implementation of High Resolution (HR) convective schemes in an implicit, fully coupled, pressure-based flow solver. Four HR schemes are realized within the framework of the NWF and DC methods and employed to solve the following three laminar flow problems: (i) lid-driven flow in a square cavity, (ii) sudden expansion in a square cavity, and (iii) flow in a planar T-junction, over three grid systems with sizes of 104, 5 × 104, and 3 × 105 control volumes. The merit of both approaches is demonstrated by comparing the computational costs required to solve these problems using the various HR schemes on the different grid systems. Whereas previous attempts to use the NWF method in a segregated flow solver failed to produce converged solutions, current results clearly demonstrate that both methods are suitable for utilization in a coupled flow solver. In terms of CPU efficiency, there is no global and consistent superiority of any method over another even though the DC method outperformed the NWF method in two of the three test problems solved. © 2010 Elsevier Inc. All rights reserved.BRAATEN ME, 1985, THESIS U MINNESOTA; Caretto L. S., 1972, Computer Methods in Applied Mechanics and Engineering, V1, DOI 10.1016-0045-7825(72)90020-5; Chakravarthy S. R., 1983, 831943 AIAA; Darwish M, 2007, NUMER HEAT TR B-FUND, V52, P353, DOI 10.1080-10407790701372785; Darwish M., 2009, J COMPUT PHYS, V28, P180; Darwish MS, 1996, NUMER HEAT TR B-FUND, V30, P217, DOI 10.1080-10407799608915080; GASKELL PH, 1988, INT J NUMER METH FL, V8, P617, DOI 10.1002-fld.1650080602; HARTEN A, 1983, J COMPUT PHYS, V49, P357, DOI 10.1016-0021-9991(83)90136-5; HAYES RE, 1989, COMPUT FLUIDS, V17, P537, DOI 10.1016-0045-7930(89)90027-3; KARKI KC, 1990, INT J NUMER METH FL, V11, P1, DOI 10.1002-fld.1650110102; LEONARD BP, 1979, COMPUT METHOD APPL M, V19, P59, DOI 10.1016-0045-7825(79)90034-3; LEONARD BP, 1988, INT J NUMER METH FL, V8, P1291, DOI 10.1002-fld.1650081013; LEONARD BP, 1990, INT J NUMER METH ENG, V30, P729, DOI 10.1002-nme.1620300412; Mazhar Z, 2001, NUMER HEAT TR B-FUND, V39, P91, DOI 10.1080-104077901460704; Moukalled F, 2000, NUMER HEAT TR B-FUND, V37, P103; PATANKAR SV, 1972, INT J HEAT MASS TRAN, V15, P1787, DOI 10.1016-0017-9310(72)90054-3; RHIE CM, 1983, AIAA J, V21, P1525, DOI 10.2514-3.8284; Rubin S., 1982, J COMPUT PHYS, V27, P153; SHYY W, 1985, J COMPUT PHYS, V57, P415, DOI 10.1016-0021-9991(85)90188-3; SYE S, 1985, NASACR174776; van Leer B., 1977, J COMPUT PHYS, V23, P101; VANKA SP, 1986, J COMPUT PHYS, V65, P138, DOI 10.1016-0021-9991(86)90008-212
What Shall We Do Without Exile? : Said and Darwish Address the Future / ﻣﺎﺫﺍ ﺳﻨﻔﻌﻞ ﻣﻦ ﺩﻭﻥ ﻣﻨﻔﻰ؟ ﺳﻌﻴﺪ ﻭﺩﺭﻭﻳﺶ ﻋﻦ ﺍﻟﻤﺴﺘﻘﺒﻞ
No full text[In a contrapuntal reading, this article revisits Edward Said\u27s final speculations on binationalism in the context of Palestine and Israel, suggesting that binationalism may offer a way of undoing the problematic ideology of nationalism. The author sets Said\u27s thoughts on the topic against Mahmoud Darwish\u27s farewell poem to Edward Said (itself, a contrapuntal text). Engaging the question of exile and what it must signify to a people displaced, the author asks what it means to move forward when the historical past is still disputed, focusing specifically on the right of return and its seeming impossibility under the current political conditions in which it is discussed. ﻓﻲ ﻗﺮﺍﺀﺓ ﻃﺒﺎﻗﻴﺔ، ﺗﺴﺘﻜﺸﻒ ﻫﺬﻩ ﺍﻟﻤﻘﺎﻟﺔ ﻣﻮﺍﻗﻒ ﺇﺩﻭﺍﺭﺩ ﺳﻌﻴﺪ ﻭﺗﺄﻣﻼﺗﻪ ﺍﻷﺧﻴﺮﺓ ﺣﻮﻝ ﻭﻃﻦ ﺛﻨﺎﺋﻲ ﺍﻟﻘﻮﻣﻴﺔ ﻓﻲ ﺳﻴﺎﻕ ﻓﻠﺴﻄﻴﻦ ﻭﺇﺳﺮﺍﺋﻴﻞ، ﻣﺸﻴﺮﺓﹰ ﺇﻟﻰ ﺃﻥ ﻭﻃﻦ ﻭﺍﺣﺪ ﺛﻨﺎﺋﻲ ﺍﻟﻘﻮﻣﻴﺔ ﻗﺪ ﻳﻜﻮﻥ ﺍﻟﺤﻞ ﻹﻳﺪﻳﻮﻟﻮﺟﻴﺔ ﺍﻟﻘﻮﻣﻴﺔ ﺍﻷﺣﺎﺩﻳﺔ ﻭﺍﻟﻤﺸﺎﻛﻞ ﺍﻟﺘﻲ ﺗﺜﻴﺮﻫﺎ . ﺗﻘﺎﺑﻞ ﺍﻟﻤﻘﺎﻟﺔ ﺑﻴﻦ ﺃﻓﻜﺎﺭ ﺳﻌﻴﺪ ﻭﻗﺼﻴﺪﺓ ﻣﺤﻤﻮﺩ ﺩﺭﻭﻳﺶ ﺍﻟﻮﺩﺍﻋﻴﺔ ﻟﺼﺪﻳﻘﻪ ﺑﻌﻨﻮﺍﻥ « ﻃﺒﺎﻕ: ﻋﻦ ﺇﺩﻭﺍﺭﺩ ﺳﻌﻴﺪ » ﺍﻟﺘﻲ ﺗﺮﻯ ﻓﻴﻬﺎ ﻧﺼﺎﹰ ﻃﺒﺎﻗﻴﺎﹰ ﺑﺈﻣﺘﻴﺎﺯ . ﺗﺘﻨﺎﻭﻝ ﺍﻟﻤﻘﺎﻟﺔ ﻗﻀﻴﺔ ﺍﻟﻤﻨﻔﻰ ﻭﻣﺎ ﻳﻌﻨﻴﻪ ﻟﻠﻤﺴﺘﺒﻌﺪﻳﻦ ﻗﺴﺮﻳﺎﹰ، ﻭﻣﻦ ﺛﻢﱠ ﺗﺘﺴﺎﺀﻝ ﻋﻦ ﻣﻌﻨﻰ ﺍﻟﻤﻀﻲ ﻗﺪﻣﺎﹰ ﻋﻨﺪﻣﺎ ﻳﻈﻞ ﺍﻟﻤﺎﺿﻲ ﺍﻟﺘﺎﺭﻳﺨﻲ ﻣﺘﻨﺎﺯﻋﺎﹰ ﻋﻠﻴﻪ، ﻭﺗﺮﻛﺰ ﻋﻠﻰ ﺣﻖ ﻋﻮﺩﺓ ﺍﻟﻔﻠﺴﻄﻴﻨﻴﻴﻦ ﺇﻟﻰ ﺩﻳﺎﺭﻫﻢ ﻣﻊ ﺃﻥ ﻫﺬﺍ ﺍﻟﺤﻖ ﻳﺒﺪﻭ ﻣﺴﺘﺤﻴﻞ ﺍﻟﺘﺤﻘﻖ ﻓﻲ ﻇﻞ ﺍﻷﻭﺿﺎﻉ ﺍﻟﺴﻴﺎﺳﻴﺔ ﺍﻟﺮﺍﻫﻨﺔ .
GridNet: A Hybrid LSTM-Based Deep Learning Approach for Accurate Electricity Consumption Forecasting in Smart Grid Systems
No full textData Availability Statement:
Upon reasonable request, the corresponding author will provide access to the data that supports
this study.Accurate forecasting of power production and consumption is crucial for optimizing smart grid operations, especially with the growing integration of renewable energy sources, and minimizing CO₂ emissions. This study develops GridNet, a deep learning-based model for forecasting next-hour electricity consumption using the past 24 hours of electricity and time features. GridNet utilizes a two-layer stacked Long Short-Term Memory (LSTM) network with dropout layers to prevent overfitting and improve generalization, followed by a dense output layer. Early stopping and learning rate reduction callbacks were applied to enhance convergence efficiency. The model was optimized using the Adam optimizer and a hybrid loss function combining Mean Squared Error (MSE) with L1 regularization for improved prediction accuracy and robustness. GridNet was trained on a six-year hourly dataset from Romania, covering diverse energy sources like nuclear, wind, solar, for 30 epochs. The performance of the proposed model GridNet was evaluated using several standard metrics, including the Coefficient of Determination (R2), Mean Absolute Error (MAE), MSE, and Root Mean Squared Error (RMSE). Additionally, GridNet's effectiveness was compared with state-of-the-art algorithms, including XGBoost, KNN, Random Forest, and SVM. GridNet outperforms all competing algorithms by up to 59.9% in R2, 72.0% in MAE, 89.8% in MSE, and 68.1% in RMSE, demonstrating its superior accuracy in forecasting electricity consumption trends in smart grids.Kuwait Foundation for the Advancement of Sciences (KFAS)
Mahmud Darwish in Parisian Exile
No full textThe bachelor's thesis deals with the theme of exile in Paris (1983-1995) in the work and life of the Palestinian poet and prosaist Maḥmoud Darwish. Based on collected interviews with the author himself and available publications, the work aims to provide a comprehensive picture of Darwish's more than ten-year stay in Paris, specify his literary work at that time, and create a picture of Darwish's Parisian experience. This bachelor's thesis is one of the first comprehensive descriptions of his social and literary activities in particular, which brings us various insights not only into his life at that time, but also into his literary work. The aim of the work is not only to offer an insight into Darwish's life in Paris from a social point of view, but also to provide a more comprehensive picture of his literary work
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