Tue, 10 Jan 2023
14:00
L1

Exact domain truncation for scattering problems

Robert Kirby
(Baylor University)
Abstract

While scattering problems are posed on unbounded domains, volumetric discretizations typically require truncating the domain at a finite distance, closing the system with some sort of boundary condition.  These conditions typically suffer from some deficiency, such as perturbing the boundary value problem to be solved or changing the character of the operator so that the discrete system is difficult to solve with iterative methods.

We introduce a new technique for the Helmholtz problem, based on using the Green formula representation of the solution at the artificial boundary.  Finite element discretization of the resulting system gives optimal convergence estimates.  The resulting algebraic system can be solved effectively with a matrix-free GMRES implementation, preconditioned with the local part of the operator.  Extensions to the Morse-Ingard problem, a coupled system of pressure/temperature equations arising in modeling trace gas sensors, will also be given.

Prospects for Galactic transient sources detection with the Cherenkov Telescope Array
 López-Oramas, A Bulgarelli, A Chaty, S Chernyakova, M Gnatyk, R Hnatyk, B Kantzas, D Markoff, S McKeague, S Mereghetti, S Mestre, E di Piano, A Romano, P Sadeh, I Sergijenko, O Sidoli, L Spolon, A de Ona Wilhelmi, E Piano, G Zampieri, L Abdalla, H Abe, H Abe, S Abusleme, A Acero, F Acharyya, A Acín Portella, V Ackley, K Adam, R Adams, C Adhikari, S Aguado-Ruesga, I Agudo, I Aguilera, R Aguirre-Santaella, A Aharonian, F Alberdi, A Alfaro, R Alfaro, J Alispach, C Aloisio, R Alves Batista, R Amans, J Amati, L Amato, E Ambrogi, L Ambrosi, G Ambrosio, M Ammendola, R Anderson, J Anduze, M Angüner, E Antonelli, L Antonuccio, V Antoranz, P Anutarawiramkul, R Aragunde Gutierrez, J Aramo, C Araudo, A Araya, M Arbet-Engels, A Arcaro, C Arendt, V Armand, C Armstrong, T Arqueros, F Arrabito, L Arsioli, B Artero, M Asano, K Ascasíbar, Y Aschersleben, J Ashley, M Attinà, P Aubert, P Singh, C Baack, D Babic, A Backes, M Baena, V Bajtlik, S Baktash, A Balazs, C Balbo, M Ballester, O Ballet, J Balmaverde, B Bamba, A Bandiera, R Baquero Larriva, A Barai, P Barbier, C Barbosa Martins, V Barcelo, M Barkov, M Barnard, M Baroncelli, L Barres de Almeida, U Barrio, J Bastieri, D Proceedings of Science volume 395 (18 Mar 2022)
Exploring the population of Galactic very-high-energy γ-ray sources
 Steppa, C Egberts, K Abdalla, H Abe, H Abe, S Abusleme, A Acero, F Acharyya, A Acín Portella, V Ackley, K Adam, R Adams, C Adhikari, S Aguado-Ruesga, I Agudo, I Aguilera, R Aguirre-Santaella, A Aharonian, F Alberdi, A Alfaro, R Alfaro, J Alispach, C Aloisio, R Alves Batista, R Amans, J Amati, L Amato, E Ambrogi, L Ambrosi, G Ambrosio, M Ammendola, R Anderson, J Anduze, M Angüner, E Antonelli, L Antonuccio, V Antoranz, P Anutarawiramkul, R Aragunde Gutierrez, J Aramo, C Araudo, A Araya, M Arbet-Engels, A Arcaro, C Arendt, V Armand, C Armstrong, T Arqueros, F Arrabito, L Arsioli, B Artero, M Asano, K Ascasíbar, Y Aschersleben, J Ashley, M Attinà, P Aubert, P Singh, C Baack, D Babic, A Backes, M Baena, V Bajtlik, S Baktash, A Balazs, C Balbo, M Ballester, O Ballet, J Balmaverde, B Bamba, A Bandiera, R Baquero Larriva, A Barai, P Barbier, C Barbosa Martins, V Barcelo, M Barkov, M Barnard, M Baroncelli, L Barres de Almeida, U Barrio, J Bastieri, D Batista, P Batkovic, I Bauer, C Bautista-González, R Baxter, J Becciani, U Becerra González, J Becherini, Y Beck, G Becker Tjus, J Bednarek, W Belfiore, A Bellizzi, L Belmont, R Benbow, W Berge, D Bernardini, E Bernardos, M Proceedings of Science volume 395 (18 Mar 2022)
Sensitivity of the Cherenkov Telescope Array to emission from the gamma-ray counterparts of neutrino events
 Sergijenko, O Brown, A Fiorillo, D de León, A Satalecka, K Tung, C Reimann, R Glauch, T Taboada, I Abdalla, H Abe, H Abe, S Abusleme, A Acero, F Acharyya, A Acín Portella, V Ackley, K Adam, R Adams, C Adhikari, S Aguado-Ruesga, I Agudo, I Aguilera, R Aguirre-Santaella, A Aharonian, F Alberdi, A Alfaro, R Alfaro, J Alispach, C Aloisio, R Alves Batista, R Amans, J Amati, L Amato, E Ambrogi, L Ambrosi, G Ambrosio, M Ammendola, R Anderson, J Anduze, M Angüner, E Antonelli, L Antonuccio, V Antoranz, P Anutarawiramkul, R Aragunde Gutierrez, J Aramo, C Araudo, A Araya, M Arbet-Engels, A Arcaro, C Arendt, V Armand, C Armstrong, T Arqueros, F Arrabito, L Arsioli, B Artero, M Asano, K Ascasíbar, Y Aschersleben, J Ashley, M Attinà, P Aubert, P Singh, C Baack, D Babic, A Backes, M Baena, V Bajtlik, S Baktash, A Balazs, C Balbo, M Ballester, O Ballet, J Balmaverde, B Bamba, A Bandiera, R Baquero Larriva, A Barai, P Barbier, C Barbosa Martins, V Barcelo, M Barkov, M Barnard, M Baroncelli, L Barres de Almeida, U Barrio, J Bastieri, D Batista, P Batkovic, I Bauer, C Bautista-González, R Baxter, J Becciani, U Becerra González, J Becherini, Y Beck, G Becker Tjus, J Bednarek, W Proceedings of Science volume 395 (18 Mar 2022)
Thu, 02 Mar 2023

12:00 - 13:00
L4

Intrinsic models on Riemannian manifolds with bounded curvature

Hansol Park
(Simon Fraser University)
Abstract

We investigate the long-time behaviour of solutions to a nonlocal partial differential equation on smooth Riemannian manifolds of bounded sectional curvature. The equation models self-collective behaviour with intrinsic interactions that are modeled by an interaction potential. Without the diffusion term, we consider attractive interaction potentials and establish sufficient conditions for a consensus state to form asymptotically. In addition, we quantify the approach to consensus, by deriving a convergence rate for the diameter of the solution’s support. With the diffusion term, the attractive interaction and the diffusion compete. We provide the conditions of the attractive interaction for each part to win.

Thu, 19 Jan 2023

12:00 - 13:00
L6

On the Incompressible Limit for a Tumour Growth Model Incorporating Convective Effects

Markus Schmidtchen
(TU Dresden)
Abstract

In this seminar, we study a tissue growth model with applications to tumour growth. The model is based on that of Perthame, Quirós, and Vázquez proposed in 2014 but incorporated the advective effects caused, for instance, by the presence of nutrients, oxygen, or, possibly, as a result of self-propulsion. The main result of this work is the incompressible limit of this model, which builds a bridge between the density-based model and a geometry free-boundary problem by passing to a singular limit in the pressure law. The limiting objects are then proven to be unique.

Substrate Curvature Curbs the Coffee Ring Effect
 McCarthy, J Castrejón-Pita, A Adda-Bedia, M Vella, D (21 Dec 2022)
Search for sub-TeV Neutrino Emission from Novae with IceCube-DeepCore
 Abbasi, R Ackermann, M Adams, J Aggarwal, N Aguilar, J Ahlers, M Alameddine, J Alves, A Amin, N Andeen, K Anderson, T Anton, G Argüelles, C Ashida, Y Athanasiadou, S Axani, S Bai, X V., A Baricevic, M Barwick, S Basu, V Bay, R Beatty, J Becker, K Tjus, J Beise, J Bellenghi, C BenZvi, S Berley, D Bernardini, E Besson, D Binder, G Bindig, D Blaufuss, E Blot, S Bontempo, F Book, J Borowka, J Meneguolo, C Böser, S Botner, O Böttcher, J Bourbeau, E Braun, J Brinson, B Brostean-Kaiser, J Burley, R Busse, R Campana, M Carnie-Bronca, E Chen, C Chen, Z Chirkin, D Choi, S Clark, B Classen, L Coleman, A Collin, G Connolly, A Conrad, J Coppin, P Correa, P Countryman, S Cowen, D Dappen, C Dave, P De Clercq, C DeLaunay, J López, D Dembinski, H Deoskar, K Desai, A Desiati, P de Vries, K de Wasseige, G DeYoung, T Diaz, A Diaz-Vélez, J Dittmer, M Dujmovic, H DuVernois, M Ehrhardt, T Eller, P Engel, R Erpenbeck, H Evans, J Evenson, P Fan, K Fazely, A Fedynitch, A Feigl, N Fiedlschuster, S Fienberg, A Finley, C Fischer, L Fox, D Franckowiak, A Friedman, E Fritz, A Fürst, P Gaisser, T Gallagher, J Ganster, E Garcia, A Garrappa, S Gerhardt, L Ghadimi, A Glaser, C Glauch, T Glüsenkamp, T Goehlke, N Gonzalez, J Goswami, S Grant, D Gray, S Grégoire, T Griffin, S Griswold, S Günther, C Gutjahr, P Haack, C Hallgren, A Halliday, R Halve, L Halzen, F Hamdaoui, H Minh, M Hanson, K Hardin, J Harnisch, A Hatch, P Haungs, A Helbing, K Hellrung, J Henningsen, F Heuermann, L Hickford, S Hidvegi, A Hill, C Hill, G Hoffman, K Hoshina, K Hou, W Huber, T Hultqvist, K Hünnefeld, M Hussain, R Hymon, K In, S Iovine, N Ishihara, A Jansson, M Japaridze, G Jeong, M Jin, M Jones, B Kang, D Kang, W Kang, X Kappes, A Kappesser, D Kardum, L Karg, T Karl, M Karle, A Katz, U Kauer, M Kelley, J Kheirandish, A Kin, K Kiryluk, J Klein, S Kochocki, A Koirala, R Kolanoski, H Kontrimas, T Köpke, L Kopper, C Koskinen, D Koundal, P Kovacevich, M Kowalski, M Kozynets, T Kruiswijk, K Krupczak, E Kumar, A Kun, E Kurahashi, N Lad, N Gualda, C Lamoureux, M Larson, M Lauber, F Lazar, J Lee, J DeHolton, K Leszczyńska, A Lincetto, M Liu, Q Liubarska, M Lohfink, E Love, C Mariscal, C Lu, L Lucarelli, F Ludwig, A Luszczak, W Lyu, Y Ma, W Madsen, J Mahn, K Makino, Y Mancina, S Sainte, W Mariş, I Marka, S Marka, Z Marsee, M Martinez-Soler, I Maruyama, R Mayhew, F McElroy, T McNally, F Mead, J Meagher, K Mechbal, S Medina, A Meier, M Meighen-Berger, S Merckx, Y Merten, L Micallef, J Mockler, D Montaruli, T Moore, R Morii, Y Morse, R Moulai, M Mukherjee, T Naab, R Nagai, R Naumann, U Nayerhoda, A Necker, J Neumann, M Niederhausen, H Nisa, M Noell, A Nowicki, S Pollmann, A Oehler, M Oeyen, B Olivas, A Orsoe, R Osborn, J O'Sullivan, E Pandya, H Pankova, D Park, N Parker, G Paudel, E Paul, L Heros, C Peterson, J Philippen, S Pieper, S Pizzuto, A Plum, M Popovych, Y Rodriguez, M Pries, B Procter-Murphy, R Przybylski, G Raab, C Rack-Helleis, J Rawlins, K Rechav, Z Rehman, A Reichherzer, P Renzi, G Resconi, E Reusch, S Rhode, W Richman, M Riedel, B Roberts, E Robertson, S Rodan, S Roellinghoff, G Rongen, M Rott, C Ruhe, T Ruohan, L Ryckbosch, D Cantu, D Safa, I Saffer, J Salazar-Gallegos, D Sampathkumar, P Herrera, S Sandrock, A Santander, M Sarkar, S Savelberg, J Savina, P Schaufel, M Schieler, H Schindler, S Schlüter, B Schmidt, T Schneider, J Schröder, F Schumacher, L Schwefer, G Sclafani, S Seckel, D Seunarine, S Sharma, A Shefali, S Shimizu, N Silva, M Skrzypek, B Smithers, B Snihur, R Soedingrekso, J Søgaard, A Soldin, D Spannfellner, C Spiczak, G Spiering, C Stamatikos, M Stanev, T Stein, R Stezelberger, T Stürwald, T Stuttard, T Sullivan, G Taboada, I Ter-Antonyan, S Thompson, W Thwaites, J Tilav, S Tollefson, K Tönnis, C Toscano, S Tosi, D Trettin, A Tung, C Turcotte, R Twagirayezu, J Ty, B Elorrieta, M Upshaw, K Valtonen-Mattila, N Vandenbroucke, J van Eijndhoven, N Vannerom, D van Santen, J Vara, J Veitch-Michaelis, J Verpoest, S Veske, D Walck, C Watson, T Weaver, C Weigel, P Weindl, A Weldert, J Wendt, C Werthebach, J Weyrauch, M Whitehorn, N Wiebusch, C Willey, N Williams, D Wolf, M Wrede, G Wulff, J Xu, X Yanez, J Yildizci, E Yoshida, S Yu, S Yuan, T Zhang, Z Zhelnin, P (13 Dec 2022)
A Search for Coincident Neutrino Emission from Fast Radio Bursts with Seven Years of IceCube Cascade Events
 Abbasi, R Ackermann, M Adams, J Aggarwal, N Aguilar, J Ahlers, M Alameddine, J Alves, A Amin, N Andeen, K Anderson, T Anton, G Argüelles, C Ashida, Y Athanasiadou, S Axani, S Bai, X V., A Baricevic, M Barwick, S Basu, V Bay, R Beatty, J Becker, K Tjus, J Beise, J Bellenghi, C BenZvi, S Berley, D Bernardini, E Besson, D Binder, G Bindig, D Blaufuss, E Blot, S Bontempo, F Book, J Borowka, J Meneguolo, C Böser, S Botner, O Böttcher, J Bourbeau, E Braun, J Brinson, B Brostean-Kaiser, J Burley, R Busse, R Campana, M Carnie-Bronca, E Chen, C Chen, Z Chirkin, D Choi, S Clark, B Classen, L Coleman, A Collin, G Connolly, A Conrad, J Coppin, P Correa, P Countryman, S Cowen, D Dappen, C Dave, P De Clercq, C DeLaunay, J López, D Dembinski, H Deoskar, K Desai, A Desiati, P de Vries, K de Wasseige, G DeYoung, T Diaz, A Díaz-Vélez, J Dittmer, M Dujmovic, H DuVernois, M Ehrhardt, T Eller, P Engel, R Erpenbeck, H Evans, J Evenson, P Fan, K Fazely, A Fedynitch, A Feigl, N Fiedlschuster, S Fienberg, A Finley, C Fischer, L Fox, D Franckowiak, A Friedman, E Fritz, A Fürst, P Gaisser, T Gallagher, J Ganster, E Garcia, A Garrappa, S Gerhardt, L Ghadimi, A Glaser, C Glauch, T Glüsenkamp, T Goehlke, N Gonzalez, J Goswami, S Grant, D Gray, S Grégoire, T Griffin, S Griswold, S Günther, C Gutjahr, P Haack, C Hallgren, A Halliday, R Halve, L Halzen, F Hamdaoui, H Minh, M Hanson, K Hardin, J Harnisch, A Hatch, P Haungs, A Helbing, K Hellrung, J Henningsen, F Heuermann, L Hickford, S Hidvegi, A Hill, C Hill, G Hoffman, K Hoshina, K Hou, W Huber, T Hultqvist, K Hünnefeld, M Hussain, R Hymon, K In, S Iovine, N Ishihara, A Jansson, M Japaridze, G Jeong, M Jin, M Jones, B Kang, D Kang, W Kang, X Kappes, A Kappesser, D Kardum, L Karg, T Karl, M Karle, A Katz, U Kauer, M Kelley, J Kheirandish, A Kin, K Kiryluk, J Klein, S Kochocki, A Koirala, R Kolanoski, H Kontrimas, T Köpke, L Kopper, C Koskinen, D Koundal, P Kovacevich, M Kowalski, M Kozynets, T Kruiswijk, K Krupczak, E Kumar, A Kun, E Kurahashi, N Lad, N Gualda, C Lamoureux, M Larson, M Lauber, F Lazar, J Lee, J DeHolton, K Leszczyńska, A Lincetto, M Liu, Q Liubarska, M Lohfink, E Love, C Mariscal, C Lu, L Lucarelli, F Ludwig, A Luszczak, W Lyu, Y Ma, W Madsen, J Mahn, K Makino, Y Mancina, S Sainte, W Mariş, I Marka, S Marka, Z Marsee, M Martinez-Soler, I Maruyama, R Mayhew, F McElroy, T McNally, F Mead, J Meagher, K Mechbal, S Medina, A Meier, M Meighen-Berger, S Merckx, Y Merten, L Micallef, J Mockler, D Montaruli, T Moore, R Morii, Y Morse, R Moulai, M Mukherjee, T Naab, R Nagai, R Naumann, U Nayerhoda, A Necker, J Neumann, M Niederhausen, H Nisa, M Noell, A Nowicki, S Pollmann, A Oehler, M Oeyen, B Olivas, A Orsoe, R Osborn, J O'Sullivan, E Pandya, H Pankova, D Park, N Parker, G Paudel, E Paul, L Heros, C Peterson, J Philippen, S Pieper, S Pizzuto, A Plum, M Popovych, Y Rodriguez, M Pries, B Procter-Murphy, R Przybylski, G Raab, C Rack-Helleis, J Rawlins, K Rechav, Z Rehman, A Reichherzer, P Renzi, G Resconi, E Reusch, S Rhode, W Richman, M Riedel, B Roberts, E Robertson, S Rodan, S Roellinghoff, G Rongen, M Rott, C Ruhe, T Ruohan, L Ryckbosch, D Safa, I Saffer, J Salazar-Gallegos, D Sampathkumar, P Herrera, S Sandrock, A Santander, M Sarkar, S Savelberg, J Savina, P Schaufel, M Schieler, H Schindler, S Schlüter, B Schmidt, T Schneider, J Schröder, F Schumacher, L Schwefer, G Sclafani, S Seckel, D Seunarine, S Sharma, A Shefali, S Shimizu, N Silva, M Skrzypek, B Smithers, B Snihur, R Soedingrekso, J Søgaard, A Soldin, D Spannfellner, C Spiczak, G Spiering, C Stamatikos, M Stanev, T Stein, R Stezelberger, T Stürwald, T Stuttard, T Sullivan, G Taboada, I Ter-Antonyan, S Thompson, W Thwaites, J Tilav, S Tollefson, K Tönnis, C Toscano, S Tosi, D Trettin, A Tung, C Turcotte, R Twagirayezu, J Ty, B Elorrieta, M Upshaw, K Valtonen-Mattila, N Vandenbroucke, J van Eijndhoven, N Vannerom, D van Santen, J Vara, J Veitch-Michaelis, J Verpoest, S Veske, D Walck, C Watson, T Weaver, C Weigel, P Weindl, A Weldert, J Wendt, C Werthebach, J Weyrauch, M Whitehorn, N Wiebusch, C Willey, N Williams, D Wolf, M Wrede, G Wulff, J Xu, X Yanez, J Yildizci, E Yoshida, S Yu, S Yuan, T Zhang, Z Zhelnin, P (13 Dec 2022)
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