Browsing by Subject "Lagrange multipliers"

Now showing items 1-20 of 23

    • Article  

      Analysis of the singular function boundary integral method for a biharmonic problem with one boundary singularity 

      Christodoulou, Evgenia; Elliotis, Miltiades C.; Georgiou, Georgios C.; Xenophontos, Christos A. (2012)
      In this article, we analyze the singular function boundary integral method (SFBIM) for a two-dimensional biharmonic problem with one boundary singularity, as a model for the Newtonian stick-slip flow problem. In the SFBIM, ...
    • Article  

      Classification of noether symmetries for Lagrangians with three degrees of freedom 

      Damianou, Pantelis A.; Sophocleous, Christodoulos (2004)
      The noether symmetries of the Euler-Lagrange equations for a Hamiltonian system with three degrees were classified. All groups were classified that appeared as symmetries of a general Hamiltonians system of n degrees of ...
    • Article  

      Comparison of two methods for the computation of singular solutions in elliptic problems 

      Georgiou, Georgios C.; Boudouvis, Andreas G.; Poullikkas, A. (1997)
      We compare two numerical methods for the solution of elliptic problems with boundary singularities. The first is the integrated singular basis function method (ISBFM), a finite-element method in which the solution is ...
    • Article  

      Lagrangian particle dispersion in turbulent flow over a wall mounted obstacle 

      Grigoriadis, D. G. E.; Kassinos, Stavros C. (2009)
      Large-eddy simulations (LES) of particle-laden turbulent flows are presented in order to investigate the effects of particle response time on the dispersion patterns of a space developing flow with an obstruction, where ...
    • Article  

      Noether and master symmetries for the Toda lattice 

      Damianou, Pantelis A.; Sophocleous, Christodoulos (2005)
      In this letter we examine the interrelation between Noether symmetries, master symmetries and recursion operators for the Toda lattice. The topics include invariants, higher Poisson brackets and the various relations they ...
    • Article  

      Numerical simulations of cessation flows of a Bingham plastic with the augmented Lagrangian method 

      Muravleva, L.; Muravleva, E.; Georgiou, Georgios C.; Mitsoulis, Evan C. (2010)
      The augmented Lagrangian/Uzawa method has been used to study benchmark one-dimensional cessation flow problems of a Bingham fluid, such as the plane Couette flow, and the plane, round, and annular Poiseuille flows. The ...
    • Conference Object  

      One and two-pion production in pp reactions with the high acceptance Di-electron spectrometer at GSI 

      Ramstein, B.; Agakishiev, G.; Behnke, C.; Belver, D.; Belyaev, A.; Berger-Chen, J. C.; Blanco, A.; Blume, C.; Böhmer, M.; Cabanelas, Pablo; Chernenko, S.; Dritsa, Christina; Dybczak, A.; Epple, E.; Fabbietti, L.; Fateev, O.; Fonte, P.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzón, J. A.; Gill, K.; Golubeva, M.; González-Díaz, D.; Guber, F.; Gumberidze, M.; Harabasz, S.; Hennino, T.; Holzmann, R.; Huck, P.; Höhne, C.; Ierusalimov, A.; Ivashkin, A.; Jurkovic, M.; Kämpfer, B.; Karavicheva, T.; Koenig, I.; Koenig, W.; Kolb, B. W.; Korcyl, G.; Kornakov, G.; Rotte, R.; Krása, Antonín; Krebs, E.; Krizek, F.; Kozuch, A.; Kuc, H.; Kugler, A.; Kurepin, A.; Kurilkin, A.; Kurilkin, P.; Ladygin, V.; Lalik, R.; Lang, S.; Lapidus, K.; Lebedev, A.; Lopes, L.; Lorenz, M.; Liu, T.; Maier, L.; Mangiarotti, A.; Markert, J.; Metag, V.; Michel, J.; Müntz, C.; Münzet, R.; Naumann, L.; Palka, M.; Parpottas, Yiannis; Perez-Cavalcanti, T.; Pechenov, V.; Pechenova, O.; Pietraszko, J.; Przygoda, W.; Ramstein, B.; Rehnisch, L.; Reshetin, A.; Rustamov, A.; Sadovsky, A.; Salabura, P.; Scheib, T.; Schuldes, H.; Siebenson, J.; Sobolev, Yu G.; Spataro, S.; Spruck, B.; Ströbele, H.; Stroth, J.; Strzempek, P.; Sturm, C.; Svoboda, O.; Tarantola, A.; Teilab, K.; Tlusty, P.; Traxler, M.; Tsertos, Haralambos; Vasiliev, T.; Wagner, V.; Weber, M.; Wendisch, C.; Wisniowski, M.; Wüstenfeld, J.; Yurevich, S.; Zanevsky, Y. (CERN, 2013)
      We present exclusive meaurements of the pp→pnπ+ and pp→ppπO reactions at 1.25 GeV, 2.2 GeV and 3.5 GeV and of the pp→ppπ+π- reaction at 1.25 GeV with the High Acceptance Di-Electron Spectrometer at GSI. Total and differential ...
    • Article  

      Search for Pair Production of Scalar Top Quarks in R-Parity Violating Decay Modes in pp̄ Collisions at √s = 1.8 TeV 

      Acosta, D.; Affolder, T.; Akimoto, H.; Albrow, M. G.; Ambrose, D.; Amidei, D.; Anikeev, K.; Antos, J.; Apollinari, G.; Arisawa, T.; Artikov, A.; Asakawa, T.; Ashmanskas, W.; Azfar, F.; Azzi-Bacchetta, P.; Bacchetta, N.; Bachacou, H.; Badgett, W.; Bailey, S.; de Barbaro, P.; Barbaro-Galtieri, A.; Barnes, V. E.; Barnett, B. A.; Baroiant, S.; Barone, M.; Bauer, G.; Bedeschi, F.; Behari, S.; Belforte, S.; Bell, W. H.; Bellettini, G.; Bellinger, J.; Benjamin, D.; Bensinger, J.; Beretvas, Andrew; Berryhill, J.; Bhatti, A.; Binkley, M.; Bisello, D.; Bishai, M.; Blair, R. E.; Blocker, C.; Bloom, K.; Blumenfeld, B.; Blusk, S. R.; Bocci, A.; Bodek, A.; Bolla, G.; Bolshov, A.; Bonushkin, Yu Ye; Bortoletto, D.; Boudreau, J.; Brandl, A.; Bromberg, C.; Brozovic, M.; Brubaker, E.; Bruner, N.; Budagov, J.; Budd, H. S.; Burkett, K.; Busetto, G.; Byrum, K. L.; Cabrera, S.; Calafiura, P.; Campbell, M.; Carithers, W.; Carlson, J.; Carlsmith, D.; Caskey, W.; Castro, A.; Cauz, D.; Cerri, A.; Cerrito, L.; Chan, A. W.; Chang, P. S.; Chang, P. T.; Chapman, J.; Chen, C.; Chen, Y. C.; Cheng, M. -T; Chertok, M.; Chiarelli, G.; Chirikov-Zorin, I.; Chlachidze, G.; Chlebana, F.; Christofek, L.; Chu, M. L.; Chung, J. Y.; Chung, W. H.; Chung, Y. S.; Ciobanu, C. I.; Clark, A. G.; Coca, M.; Colijn, A. P.; Connolly, A.; Convery, M.; Conway, J.; Cordelli, M.; Cranshaw, J.; Culbertson, R.; Dagenhart, D.; D'Auria, S.; de Cecco, S.; DeJongh, F.; Dell'Agnello, Simone; Dell'Orso, M.; Demers, S.; Demortier, L.; Deninno, M.; de Pedis, D.; Derwent, P. F.; Devlin, T.; Dionisi, Carlo; Dittmann, J. R.; Dominguez, A.; Donati, S.; D'Onofrio, M.; Dorigo, T.; Eddy, N.; Einsweiler, K.; Engels Jr., E.; Erbacher, R.; Errede, D.; Errede, S.; Eusebi, R.; Fan, Q.; Farrington, S.; Feild, R. G.; Fernandez, J. P.; Ferretti, C.; Field, R. D.; Fiori, I.; Flaugher, B.; Flores-Castillo, L. R.; Foster, G. W.; Franklin, M.; Freeman, J.; Friedman, J.; Fukui, Y.; Furic, I.; Galeotti, S.; Gallas, A.; Gallinaro, M.; Gao, T.; Garcia-Sciveres, M.; Garfinkel, A. F.; Gatti, P.; Gay, C.; Gerdes, D. W.; Gerstein, E.; Giagu, S.; Giannetti, P.; Giolo, K.; Giordani, M.; Giromini, P.; Glagolev, V.; Glenzinski, D.; Gold, M.; Goldschmidt, N.; Goldstein, J.; Gomez, G.; Goncharov, M.; Gorelov, I.; Goshaw, A. T.; Gotra, Y.; Goulianos, Konstantin; Green, C.; Gresele, A.; Grim, G.; Grosso-Pilcher, C.; Guenther, M.; Guillian, G.; Guimaraes da Costa, J.; Haas, R. M.; Haber, C.; Hahn, S. R.; Halkiadakis, Eva; Hall, C.; Handa, T.; Handler, R.; Happacher, F.; Hara, K.; Hardman, A. D.; Harris, R. M.; Hartmann, F.; Hatakeyama, K.; Hauser, J.; Heinrich, J.; Heiss, A.; Hennecke, M.; Herndon, M.; Hill, C.; Hocker, A.; Hoffman, K. D.; Hollebeek, R.; Holloway, L.; Hou, S.; Huffman, B. T.; Hughes, R.; Huston, J.; Huth, J.; Ikeda, H.; Issever, C.; Incandela, J.; Introzzi, G.; Iori, M.; Ivanov, A.; Iwai, J.; Iwata, Y.; Iyutin, B.; James, E.; Jones, M.; Joshi, U.; Kambara, H.; Kamon, T.; Kaneko, T.; Kang, J.; Karagoz Unel, M.; Karr, K.; Kartal, S.; Kasha, H.; Kato, Y.; Keaffaber, T. A.; Kelley, K.; Kelly, M.; Kennedy, R. D.; Kephart, R.; Khazins, D.; Kikuchi, T.; Kilminster, B.; Kim, B. J.; Kim, D. H.; Kim, H. S.; Kim, M. J.; Kim, S. B.; Kim, S. H.; Kim, T. H.; Kim, Y. K.; Kirby, M.; Kirk, M.; Kirsch, L.; Klimenko, S.; Koehn, P.; Kondo, K.; Konigsberg, J.; Korn, A.; Korytov, A.; Kotelnikov, K.; Kovács, Eve V.; Kroll, J.; Kruse, M.; Krutelyov, V.; Kuhlmann, S. E.; Kurino, K.; Kuwabara, T.; Kuznetsova, N.; Laasanen, A. T.; Lai, N.; Lami, S.; Lammel, S.; Lancaster, J.; Lannon, K.; Lancaster, M.; Lander, R.; Lath, A.; Latino, G.; LeCompte, T.; Le, Y.; Lee, J.; Lee, S. W.; Leonardo, N.; Leone, S.; Lewis, J. D.; Li, K.; Lin, C. S.; Lindgren, M.; Liss, T. M.; Liu, J. B.; Liu, T.; Liu, Y. C.; Litvintsev, D. O.; Lobban, O.; Lockyer, N. S.; Loginov, A.; Loken, J.; Loreti, M.; Lucchesi, D.; Lukens, P.; Lusin, S.; Lyons, L.; Lys, J.; Madrak, R.; Maeshima, K.; Maksimovic, P.; Malferrari, L.; Mangano, M.; Manca, G.; Mariotti, M.; Martignon, G.; Martin, M.; Martin, A.; Martin, V.; Martínez, M.; Matthews, J. A. J.; Mazzanti, P.; McFarland, K. S.; McIntyre, P.; Menguzzato, M.; Menzione, A.; Merkel, P.; Mesropian, C.; Meyer, A.; Miao, T.; Miller, R.; Miller, J. S.; Minato, H.; Miscetti, S.; Mishina, M.; Mitselmakher, G.; Miyazaki, Y.; Moggi, N.; Moore, E.; Moore, R.; Morita, Y.; Moulik, T.; Mulhearn, M.; Mukherjee, A.; Muller, T.; Munar, A.; Murat, P.; Murgia, S.; Nachtman, J.; Nagaslaev, V.; Nahn, S.; Nakada, H.; Nakano, I.; Napora, R.; Niell, F.; Nelson, C.; Nelson, T.; Neu, C.; Neubauer, M. S.; Neuberger, D.; Newman-Holmes, C.; Ngan, C. -Y P.; Nigmanov, T.; Niu, H.; Nodulman, L.; Nomerotski, A.; Oh, S. H.; Oh, Y. D.; Ohmoto, T.; Ohsugi, T.; Oishi, R.; Okusawa, T.; Olsen, J.; Orejudos, W.; Pagliarone, C.; Palmonari, F.; Paoletti, R.; Papadimitriou, Vaia; Partos, D.; Patrick, J.; Pauletta, G.; Paulini, M.; Pauly, T.; Paus, C.; Pellett, D.; Penzo, A.; Pescara, L.; Phillips, T. J.; Piacentino, G.; Piedra, J.; Pitts, K. T.; Pompoš, A.; Pondrom, L.; Pope, G.; Pratt, T.; Prokoshin, F.; Proudfoot, J.; Ptohos, Fotios; Pukhov, O.; Punzi, G.; Rademacker, J.; Rakitine, A.; Ratnikov, F.; Ray, H.; Reher, D.; Reichold, A.; Renton, P.; Rescigno, M.; Ribon, A.; Riegler, W.; Rimondi, F.; Ristori, L.; Riveline, M.; Robertson, W. J.; Rodrigo, T.; Rolli, S.; Rosenson, L.; Roser, R.; Rossin, R.; Rott, C.; Roy, A.; Ruiz, A.; Ryan, D.; Safonov, A.; Denis, R. S.; Sakumoto, W. K.; Saltzberg, D.; Sanchez, C.; Sansoni, A.; Santi, L.; Sarkar, S.; Sato, H.; Savard, P.; Savoy-Navarro, A.; Schlabach, P.; Schmidt, E. E.; Schmidt, M. P.; Schmitt, M.; Scodellaro, L.; Scott, A.; Scribano, A.; Sedov, A.; Seidel, S.; Seiya, Y.; Semenov, A.; Semeria, F.; Shah, T.; Shapiro, M. D.; Shepard, P. F.; Shibayama, T.; Shimojima, M.; Shochet, M.; Sidoti, A.; Siegrist, J.; Sill, A.; Sinervo, P.; Singh, P.; Slaughter, A. J.; Sliwa, K.; Snider, F. D.; Snihur, R.; Solodsky, A.; Spalding, J.; Speer, T.; Spezziga, M.; Sphicas, Paris A.; Spinella, F.; Spiropulu, Maria; Spiegel, L.; Steele, J.; Stefanini, A.; Strologas, John; Strumia, F.; Stuart, D.; Sukhanov, A.; Sumorok, K.; Suzuki, T.; Takano, T.; Takashima, R.; Takikawa, K.; Tamburello, P.; Tanaka, M.; Tannenbaum, B.; Tecchio, M.; Tesarek, R. J.; Teng, P. K.; Terashi, K.; Tether, S.; Thom, J.; Thompson, A. S.; Thomson, E.; Thurman-Keup, R.; Tipton, P.; Tkaczyk, S.; Toback, D.; Tollefson, K.; Tonelli, D.; Tonnesmann, M.; Toyoda, H.; Trischuk, W.; de Trocóniz, J. F.; Tseng, J.; Tsybychev, D.; Turini, N.; Ukegawa, F.; Unverhau, T.; Vaiciulis, T.; Valls, J.; Varganov, A.; Vataga, E.; Vejcik III, S.; Velev, G.; Veramendi, G.; Vidal, R.; Vila, I.; Vilar, R.; Volobouev, I.; von der Mey, M.; Vucinic, D.; Wagner, R. G.; Wagner, R. L.; Wagner, W.; Wallace, N. B.; Wan, Z.; Wang, C.; Wang, M. J.; Wang, S. M.; Ward, B.; Waschke, S.; Watanabe, T.; Waters, D.; Watts, T.; Weber, M.; Wenzel, H.; Wester III, W. C.; Whitehouse, B.; Wicklund, A. B.; Wicklund, E.; Wilkes, T.; Williams, H. H.; Wilson, P.; Winer, B. L.; Winn, D.; Wolbers, S.; Wolinski, D.; Wolinski, J.; Wolinski, S.; Wolter, M.; Worm, S.; Wu, X.; Würthwein, F.; Wyss, J.; Yang, U. K.; Yao, W.; Yeh, G. P.; Yeh, P.; Yi, K.; Yoh, J.; Yosef, C.; Yoshida, T.; Yu, I.; Yu, S.; Yu, Z.; Yun, J. C.; Zanello, L.; Zanetti, A.; Zetti, F.; Zucchelli, S. (2004)
      The search for pair production of scalar top quarks in an R-parity violating supersymmetry scenario in 106 pb-f of pp̄ collisions at √s = 1.8 TeV collected by the Collider Detector at Fermilab was discussed. It was found ...
    • Article  

      The singular function boundary integral method for 3-D Laplacian problems with a boundary straight edge singularity 

      Christodoulou, Evgenia; Elliotis, Miltiades C.; Xenophontos, Christos A.; Georgiou, Georgios C. (2012)
      Three-dimensional Laplace problems with a boundary straight-edge singularity caused by two intersecting flat planes are considered. The solution in the neighbourhood of the straight edge can be expressed as an asymptotic ...
    • Article  

      The singular function boundary integral method for a two-dimensional fracture problem 

      Elliotis, Miltiades C.; Georgiou, Georgios C.; Xenophontos, Christos A. (2006)
      The singular function boundary integral method (SFBIM) originally developed for Laplacian problems with boundary singularities is extended for solving two-dimensional fracture problems formulated in terms of the Airy stress ...
    • Article  

      The singular function boundary integral method for an elastic plane stress wedge beam problem with a point boundary singularity 

      Elliotis, Miltiades C.; Charmpis, Dimos C.; Georgiou, Georgios C. (2014)
      The singular function boundary integral method (SFBIM) is applied for the numerical solution of a 2-D Laplace model problem of a perfectly elastic wedge beam under plane stress conditions. The beam has a point boundary ...
    • Article  

      The singular function boundary integral method for biharmonic problems with crack singularities 

      Elliotis, Miltiades C.; Georgiou, Georgios C.; Xenophontos, Christos A. (2007)
      We use the singular function boundary integral method (SFBIM) to solve two model fracture problems on the plane. In the SFBIM, the solution is approximated by the leading terms of the local asymptotic solution expansion, ...
    • Article  

      A singular function boundary integral method for laplacian problems with boundary singularities 

      Xenophontos, Christos A.; Elliotis, Miltiades C.; Georqiou, Georgios E. (2006)
      A singular function boundary integral method for Laplacian problems with boundary singularities is analyzed. In this method, the solution is approximated by the truncated asymptotic expansion for the solution near the ...
    • Conference Object  

      The singular function boundary integral method for Laplacian problems with boundary singularities in two and three-dimensions 

      Xenophontos, Christos A.; Christodoulou, Evgenia; Georgiou, Georgios C. (2010)
      We present a Singular Function Boundary Integral Method (SFBIM) for solving elliptic problems with a boundary singularity. In this method the solution is approximated by the leading terms of the asymptotic solution expansion, ...
    • Article  

      The Singular Function Boundary Integral Method for singular Laplacian problems over circular sections 

      Christodoulou, Evgenia; Xenophontos, Christos A.; Georgiou, Georgios C. (2010)
      The Singular Function Boundary Integral Method (SFBIM) for solving two-dimensional elliptic problems with boundary singularities is revisited. In this method the solution is approximated by the leading terms of the asymptotic ...
    • Article  

      A singular function boundary integral method for the laplace equation 

      Georgiou, Georgios C.; Olson, L.; Smyrlis, Yiorgos-Sokratis (1996)
      The authors present a new singular function boundary integral method for the numerical solution of problems with singularities which is based on approximation of the solution by the leading terms of the local asymptotic ...
    • Article  

      The solution of Laplacian problems over L-shaped domains with a singular function boundary integral method 

      Elliotis, Miltiades C.; Georgiou, Georgios C.; Xenophontos, Christos A. (2002)
      The singular function boundary integral method is applied for the solution of a Laplace equation problem over an L-shaped domain. The solution is approximated by the leading terms of the local asymptotic solution expansion, ...
    • Article  

      Solution of the planar Newtonian stick-slip problem with the singular function boundary integral method 

      Elliotis, Miltiades C.; Georgiou, Georgios C.; Xenophontos, Christos A. (2005)
      A singular function boundary integral method (SFBIM) is proposed for solving biharmonic problems with boundary singularities. The method is applied to the Newtonian stick-slip flow problem. The streamfunction is approximated ...
    • Article  

      Solving Laplacian problems with boundary singularities: A comparison of a singular function boundary integral method with the p/hp version of the finite element method 

      Elliotis, Miltiades C.; Georgiou, Georgios C.; Xenophontos, Christos A. (2005)
      We solve a Laplacian problem over an L-shaped domain using a singular function boundary integral method as well as the p/hp finite element method. In the former method, the solution is approximated by the leading terms of ...
    • Article  

      Special boundary approximation methods for laplace equation problems with boundary singularities- Applications to the motz problem 

      Li, Z. C.; Chan, Y. L.; Georgiou, Georgios C.; Xenophontos, Christos A. (2006)
      We investigate the convergence of special boundary approximation methods (BAMs) used for the solution of Laplace problems with a boundary singularity. In these methods, the solution is approximated in terms of the leading ...