School of Mathematical Sciences
https://qmro.qmul.ac.uk/xmlui/handle/123456789/3478
Fri, 14 May 2021 00:22:33 GMT
20210514T00:22:33Z

Ddimensional oscillators in simplicial structures: odd and even dimensions display different synchronization scenarios
https://qmro.qmul.ac.uk/xmlui/handle/123456789/71803
Ddimensional oscillators in simplicial structures: odd and even dimensions display different synchronization scenarios
Dai, X; Kovalenko, K; Molodyk, M; Wang, Z; Li, X; Musatov, D; Raigorodskii, AM; AlfaroBittner, K; Cooper, GD; Bianconi, G; Boccaletti, S
From biology to social science, the functioning of a wide range of systems is the result of elementary interactions which involve more than two constituents, so that their description has unavoidably to go beyond simple pairwiserelationships. Simplicial complexes are therefore the mathematical objects providing a faithful representation of such systems. We here present a complete theory of synchronization of $D$dimensional oscillators obeying an extended Kuramoto model, and interacting by means of 1 and 2 simplices. Not only our theory fully describes and unveils the intimate reasons and mechanisms for what was observed so far with pairwise interactions, but it also offers predictions for a series of rich and novel behaviors in simplicial structures, which include: a) a discontinuous desynchronization transition at positive values of the coupling strength for all dimensions, b) an extra discontinuous transition at zero coupling for all odd dimensions, and c) the occurrence of partially synchronized states at $D=2$ (and all odd $D$) even for negative values of the coupling strength, a feature which is inherently prohibited with pairwiseinteractions. Furthermore, our theory untangles several aspects of the emergent behavior: the system can never fully synchronize from disorder, and is characterized by an extreme multistability, in that the asymptotic stationary synchronized states depend always on the initial conditions. All our theoretical predictions are fully corroborated by extensive numerical simulations. Our results elucidate the dramatic and novel effects that higherorder interactions may induce in the collective dynamics of ensembles of coupled $D$dimensional oscillators, and can therefore be of value and interest for the understanding of many phenomena observed in nature, like for instance the swarming and/or flocking processes unfolding in three or more dimensions.
Sun, 04 Apr 2021 00:00:00 GMT
https://qmro.qmul.ac.uk/xmlui/handle/123456789/71803
20210404T00:00:00Z

Cauchy evolution of asymptotically global AdS spacetimes with no symmetries
https://qmro.qmul.ac.uk/xmlui/handle/123456789/71798
Cauchy evolution of asymptotically global AdS spacetimes with no symmetries
Bantilan, H; Figueras, P; Rossi, L
We present the first proofofprinciple Cauchy evolutions of asymptotically global anti–de Sitter (AdS) spacetimes with no imposed symmetries, employing a numerical scheme based on the generalized harmonic form of the Einstein equations. In this scheme, the main difficulty in removing all symmetry assumptions can be phrased in terms of finding a set of generalized harmonic source functions that are consistent with AdS boundary conditions. In four spacetime dimensions, we detail an explicit set of source functions that achieves evolution in full generality. A similar prescription should also lead to stable evolution in higher spacetime dimensions, in various couplings with matter fields, and on the Poincaré patch. We apply this scheme to obtain the first longtime stable
3
+
1
simulations of fourdimensional spacetimes with a negative cosmological constant, using initial data sourced by a massless scalar field. We present preliminary results of gravitational collapse with no symmetry assumptions, and the subsequent quasinormal mode ringdown to a static black hole in the bulk, which corresponds to evolution toward a homogeneous state on the boundary.
Mon, 01 Feb 2021 00:00:00 GMT
https://qmro.qmul.ac.uk/xmlui/handle/123456789/71798
20210201T00:00:00Z

A Gravitationalwave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo
https://qmro.qmul.ac.uk/xmlui/handle/123456789/71622
A Gravitationalwave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo
Abbott, BP; Abbott, R; Abbott, TD; Abraham, S; Acernese, F; Ackley, K; Adams, C; Adhikari, RX; Adya, VB; Affeldt, C; Agathos, M; Agatsuma, K; Aggarwal, N; Aguiar, OD; Aiello, L; Ain, A; Ajith, P; Allen, G; Allocca, A; Aloy, MA; Altin, PA; Amato, A; Anand, S; Ananyeva, A; Anderson, SB; Anderson, WG; Angelova, SV; Antier, S; Appert, S; Arai, K; Araya, MC; Areeda, JS; Arene, M; Arnaud, N; Aronson, SM; Arun, KG; Ascenzi, S; Ashton, G; Aston, SM; Astone, P; Aubin, F; Aufmuth, P; AultONeal, K; Austin, C; Avendano, V; AvilaAlvarez, A; Babak, S; Bacon, P; Badaracco, F; Bader, MKM; Bae, S; Baird, J; Baker, PT; Baldaccini, F; Ballardin, G; Ballmer, SW; Bals, A; Banagiri, S; Barayoga, JC; Barbieri, C; Barclay, SE; Barish, BC; Barker, D; Barkett, K; Barnum, S; Barone, F; Barr, B; Barsotti, L; Barsuglia, M; Barta, D; Bartlett, J; Bartos, I; Bassiri, R; Basti, A; Bawaj, M; Bayley, JC; Bazzan, M; Becsy, B; Bejger, M; Belahcene, I; Bell, AS; Beniwal, D; Benjamin, MG; Berger, BK; Bergmann, G; Bernuzzi, S; Berry, CPL; Bersanetti, D; Bertolini, A; Betzwieser, J; Bhandare, R; Bidler, J; Biggs, E; Bilenko, IA; Bilgili, SA; Billingsley, G; Birney, R; Birnholtz, O; Biscans, S; Bischi, M; Biscoveanu, S; Bisht, A; Bitossi, M; Bizouard, MA; Blackburn, JK; Blackman, J; Blair, CD; Blair, DG; Blair, RM; Bloemen, S; Bobba, F; Bode, N; Boer, M; Boetzel, Y; Bogaert, G; Bondu, F; Bonnand, R; Booker, P; Boom, BA; Bork, R; Boschi, V; Bose, S; Bossilkov, V; Bosveld, J; Bouffanais, Y; Bozzi, A; Bradaschia, C; Brady, PR; Bramley, A; Branchesi, M; Brau, JE; Breschi, M; Briant, T; Briggs, JH; Brighenti, F; Brillet, A; Brinkmann, M; Brockill, P; Brooks, AF; Brooks, J; Brown, DD; Brunett, S; Buikema, A; Bulik, T; Bulten, HJ; Buonanno, A; Buskulic, D; Buy, C; Byer, RL; Cabero, M; Cadonati, L; Cagnoli, G; Cahillane, C; Bustillo, JC; Callister, TA; Calloni, E; Camp, JB; Campbell, WA; Canepa, M; Cannon, KC; Cao, H; Cao, J; Carapella, G; Carbognani, F; Caride, S; Carney, MF; Carullo, G; Diaz, JC; Casentini, C; Caudill, S; Cavaglia, M; Cavalier, F; Cavalieri, R; Cella, G; CerdaDuran, P; Cesarini, E; Chaibi, O; Chakravarti, K; Chamberlin, SJ; Chan, M; Chao, S; Charlton, P; Chase, EA; ChassandeMottin, E; Chatterjee, D; Chaturvedi, M; Cheeseboro, BD; Chen, HY; Chen, X; Chen, Y; Cheng, HP; Cheong, CK; Chia, HY; Chiadini, F; Chincarini, A; Chiummo, A; Cho, G; Cho, HS; Cho, M; Christensen, N; Chu, Q; Chua, S; Chung, KW; Chung, S; Ciani, G; Ciobanu, AA; Ciolfi, R; Cipriano, F; Cirone, A; Clara, F; Clark, JA; Clearwater, P; Cleva, F; Coccia, E; Cohadon, PF; Cohen, D; Colleoni, M; Collette, CG; Collins, C; Colpi, M; Cominsky, LR; Jr, CM; Conti, L; Cooper, SJ; Corban, P; Corbitt, TR; CorderoCarrion, I; Corezzi, S; Corley, KR; Cornish, N; Corre, D; Corsi, A; Cortese, S; Costa, CA; Cotesta, R; Coughlin, MW; Coughlin, SB; Coulon, JP; Countryman, ST; Couvares, P; Covas, PB; Cowan, EE; Coward, DM; Cowart, MJ; Coyne, DC; Coyne, R; Creighton, JDE; Creighton, TD; Cripe, J; Croquette, M; Crowder, SG; Cullen, TJ; Cumming, A; Cunningham, L; Cuoco, E; Dal Canton, T; Dalya, G; Danilishin, SL; Danzmann, K; Dasgupta, A; Costa, CFDS; Datrier, LEH; Dattilo, V; Dave, I; Davier, M; Davis, D; Daw, EJ; DeBra, D; Deenadayalan, M; Degallaix, J; De Laurentis, M; Deleglise, S; Del Pozzo, W; DeMarchi, LM; Demos, N; Dent, T; De Pietri, R; De Rosa, R; De Rossi, C; DeSalvo, R; de Varona, O; Dhurandhar, S; Diaz, MC; Dietrich, T; Di Fiore, L; DiFronzo, C; Di Giorgio, C; Di Giovanni, F; Di Giovanni, M; Di Girolamo, T; Di Lieto, A; Ding, B; Di Pace, S; Di Palma, I; Di Renzo, F; Divakarla, AK; Dmitriev, A; Doctor, Z; Donovan, F; Dooley, KL; Doravari, S; Dorrington, I; Downes, TP; Drago, M; Driggers, JC; Du, Z; Ducoin, JG; Dupej, P; Durante, O; Dwyer, SE; Easter, PJ; Eddolls, G; Edo, TB; Effler, A; Ehrens, P; Eichholz, J; Eikenberry, SS; Eisenmann, M; Eisenstein, RA; Errico, L; Essick, RC; Estelles, H; Estevez, D; Etienne, ZB; Etzel, T; Evans, M; Evans, TM; Fafone, V; Fairhurst, S; Fan, X; Farinon, S; Farr, B; Farr, WM; FauchonJones, EJ; Favata, M; Fays, M; Fazio, M; Fee, C; Feicht, J; Fejer, MM; Feng, F; FernandezGaliana, A; Ferrante, I; Ferreira, EC; Ferreira, TA; Fidecaro, F; Fiori, I; Fiorucci, D; Fishbach, M; Fisher, RP; Fishner, JM; Fittipaldi, R; FitzAxen, M; Fiumara, V; Flaminio, R; Fletcher, M; Floden, E; Flynn, E; Fong, H; Font, JA; Forsyth, PWF; Fournier, JD; Vivanco, FH; Frasca, S; Frasconi, F; Frei, Z; Freise, A; Frey, R; Frey, V; Fritschel, P; Frolov, VV; Fronze, G; Fulda, P; Fyffe, M; Gabbard, HA; Gadre, BU; Gaebel, SM; Gair, JR; Gammaitoni, L; Gaonkar, SG; GarciaQuiros, C; Garufi, F; Gateley, B; Gaudio, S; Gaur, G; Gayathri, V; Gemme, G; Genin, E; Gennai, A; George, D; George, J; Gergely, L; Ghonge, S; Ghosh, A; Ghosh, A; Ghosh, S; Giacomazzo, B; Giaime, JA; Giardina, KD; Gibson, DR; Gill, K; Glover, L; Gniesmer, J; Godwin, P; Goetz, E; Goetz, R; Goncharov, B; Gonzalez, G; Castro, JMG; Gopakumar, A; Gossan, SE; Gosselin, M; Gouaty, R; Grace, B; Grado, A; Granata, M; Grant, A; Gras, S; Grassia, P; Gray, C; Gray, R; Greco, G; Green, AC; Green, R; Gretarsson, EM; Grimaldi, A; Grimm, SJ; Groot, P; Grote, H; Grunewald, S; Gruning, P; Guidi, GM; Gulati, HK; Guo, Y; Gupta, A; Gupta, A; Gupta, P; Gustafson, EK; Gustafson, R; Haegel, L; Halim, O; Hall, BR; Hall, ED; Hamilton, EZ; Hammond, G; Haney, M; Hanke, MM; Hanks, J; Hanna, C; Hannam, MD; Hannuksela, OA; Hansen, TJ; Hanson, J; Harder, T; Hardwick, T; Haris, K; Harms, J; Harry, GM; Harry, IW; Hasskew, RK; Haster, CJ; Haughian, K; Hayes, FJ; Healy, J; Heidmann, A; Heintze, MC; Heitmann, H; Hellman, F; Hello, P; Hemming, G; Hendry, M; Heng, IS; Hennig, J; Heurs, M; Hild, S; Hinderer, T; Hochheim, S; Hofman, D; Holgado, AM; Holland, NA; Holt, K; Holz, DE; Hopkins, P; Horst, C; Hough, J; Howell, EJ; Hoy, CG; Huang, Y; Hubner, MT; Huerta, EA; Huet, D; Hughey, B; Hui, V; Husa, S; Huttner, SH; HuynhDinh, T; Idzkowski, B; Iess, A; Inchauspe, H; Ingram, C; Inta, R; Intini, G; Irwin, B; Isa, HN; Isac, JM; Isi, M; Iyer, BR; Jacqmin, T; Jadhav, SJ; Jani, K; Janthalur, NN; Jaranowski, P; Jariwala, D; Jenkins, AC; Jiang, J; Johnson, DS; Jones, AW; Jones, DI; Jones, JD; Jones, R; Jonker, RJG; Ju, L; Junker, J; Kalaghatgi, CV; Kalogera, V; Kamai, B; Kandhasamy, S; Kang, G; Kanner, JB; Kapadia, SJ; Karathanasis, C; Karki, S; Kashyap, R; Kasprzack, M; Katsanevas, S; Katsavounidis, E; Katzman, W; Kaufer, S; Kawabe, K; Keerthana, NV; Kefelian, F; Keitel, D; Kennedy, R; Key, JS; Khalili, FY; Khan, I; Khan, S; Khazanov, EA; Khetan, N; Khursheed, M; Kijbunchoo, N; Kim, C; Kim, JC; Kim, K; Kim, W; Kim, WS; Kim, YM; Kimball, C; King, PJ; KinleyHanlon, M; Kirchhoff, R; Kissel, JS; Kleybolte, L; Klika, JH; Klimenko, S; Knowles, TD; Koch, P; Koehlenbeck, SM; Koekoek, G; Koley, S; Kondrashov, V; Kontos, A; Koper, N; Korobko, M; Korth, WZ; Kovalam, M; Kozak, DB; Kramer, C; Kringel, V; Krishnendu, N; Krolak, A; Krupinski, N; Kuehn, G; Kumar, A; Kumar, P; Kumar, R; Kumar, R; Kuo, L; Kutynia, A; Kwang, S; Lackey, BD; Laghi, D; Lai, KH; Lam, TL; Landry, M; Lane, BB; Lang, RN; Lange, J; Lantz, B; Lanza, RK; LartauxVollard, A; Lasky, PD; Laxen, M; Lazzarini, A; Lazzaro, C; Leaci, P; Leavey, S; Lecoeuche, YK; Lee, CH; Lee, HK; Lee, HM; Lee, HW; Lee, J; Lee, K; Lehmann, J; Lenon, AK; Leroy, N; Letendre, N; Levin, Y; Li, A; Li, J; Li, KJL; Li, TGF; Li, X; Lin, F; Linde, F; Linker, SD; Littenberg, TB; Liu, J; Liu, X; LlorensMonteagudo, M; Lo, RKL; London, LT; Longo, A; Lorenzini, M; Loriette, V; Lormand, M; Losurdo, G; Lough, JD; Lousto, CO; Lovelace, G; Lower, ME; Luck, H; Lumaca, D; Lundgren, AP; Lynch, R; Ma, Y; Macas, R; Macfoy, S; MacInnis, M; Macleod, DM; Macquet, A; Hernandez, IM; MaganaSandoval, F; Magee, RM; Majorana, E; Maksimovic, I; Malik, A; Man, N; Mandic, V; Mangano, V; Mansell, GL; Manske, M; Mantovani, M; Mapelli, M; Marchesoni, F; Marion, F; Marka, S; Marka, Z; Markakis, C; Markosyan, AS; Markowitz, A; Maros, E; Marquina, A; Marsat, S; Martelli, F; Martin, IW; Martin, RM; Martinez, V; Martynov, DV; Masalehdan, H; Mason, K; Massera, E; Masserot, A; Massinger, TJ; MassoReid, M; Mastrogiovanni, S; Matas, A; Matichard, F; Matone, L; Mavalvala, N; McCann, JJ; McCarthy, R; McClelland, DE; McCormick, S; McCuller, L; McGuire, SC; McIsaac, C; McIver, J; McManus, DJ; McRae, T; McWilliams, ST; Meacher, D; Meadors, GD; Mehmet, M; Mehta, AK; Meidam, J; Villa, EM; Melatos, A; Mendell, G; Mercer, RA; Mereni, L; Merfeld, K; Merilh, EL; Merzougui, M; Meshkov, S; Messenger, C; Messick, C; Messina, F; Metzdorff, R; Meyers, PM; Meylahn, F; Miani, A; Miao, H; Michel, C; Middleton, H; Milano, L; Miller, AL; Millhouse, M; Mills, JC; MilovichGoff, MC; Minazzoli, O; Minenkov, Y; Mishkin, A; Mishra, C; Mistry, T; Mitra, S; Mitrofanov, VP; Mitselmakher, G; Mittleman, R; Mo, G; Moffa, D; Mogushi, K; Mohapatra, SRP; MolinaRuiz, M; Mondin, M; Montani, M; Moore, CJ; Moraru, D; Morawski, F; Moreno, G; Morisaki, S; Mours, B; MowLowry, CM; Muciaccia, F; Mukherjee, A; Mukherjee, D; Mukherjee, S; Mukherjee, S; Mukund, N; Mullavey, A; Munch, J; Muniz, EA; Muratore, M; Murray, PG; Nagar, A; Nardecchia, I; Naticchioni, L; Nayak, RK; Neil, BF; Neilson, J; Nelemans, G; Nelson, TJN; Nery, M; Neunzert, A; Nevin, L; Ng, KY; Ng, S; Nguyen, C; Nguyen, P; Nichols, D; Nichols, SA; Nissanke, S; Nocera, F; North, C; Nuttall, LK; Obergaulinger, M; Oberling, J; Oganesyan, G; Ogin, GH; Oh, JJ; Oh, SH; Ohme, F; Ohta, H; Okada, MA; Oliver, M; Oppermann, P; Oram, RJ; Ormiston, RG; Ortega, LF; Ossokine, S; Ottaway, DJ; Overmier, H; Owen, BJ; Pace, AE; Pagano, G; Page, MA; Pagliaroli, G; Pai, A; Pai, SA; Palamos, JR; Palashov, O; Palomba, C; Pan, H; Panda, PK; Pang, PTH; Pankow, C; Pannarale, F; Pant, BC; Paoletti, F; Paoli, A; Parida, A; Parker, W; Pascucci, D; Pasqualetti, A; Passaquieti, R; Passuello, D; Patil, M; Patricelli, B; Payne, E; Pearlstone, BL; Pechsiri, TC; Pedersen, AJ; Pedraza, M; Pedurand, R; Pele, A; Penn, S; Perego, A; Perez, CJ; Perigois, C; Perreca, A; Petermann, J; Pfeiffer, HP; Phelps, M; Phukon, KS; Piccinni, OJ; Pichot, M; Piergiovanni, F; Pierro, V; Pillant, G; Pinard, L; Pinto, IM; Pirello, M; Pitkin, M; Plastino, W; Poggiani, R; Pong, DYT; Ponrathnam, S; Popolizio, P; Porter, EK; Powell, J; Prajapati, AK; Prasad, J; Prasai, K; Prasanna, R; Pratten, G; Prestegard, T; Principe, M; Prodi, GA; Prokhorov, L; Punturo, M; Puppo, P; Purrer, M; Qi, H; Quetschke, V; Quinonez, PJ; Raab, FJ; Raaijmakers, G; Radkins, H; Radulesco, N; Raffai, P; Raja, S; Rajan, C; Rajbhandari, B; Rakhmanov, M; Ramirez, KE; RamosBuades, A; Rana, J; Rao, K; Rapagnani, P; Raymond, V; Razzano, M; Read, J; Regimbau, T; Rei, L; Reid, S; Reitze, DH; Rettegno, P; Ricci, F; Richardson, CJ; Richardson, JW; Ricker, PM; Riemenschneider, G; Riles, K; Rizzo, M; Robertson, NA; Robinet, F; Rocchi, A; Rolland, L; Rollins, JG; Roma, VJ; Romanelli, M; Romano, J; Romano, R; Romel, CL; Romie, JH; Rose, CA; Rose, D; Rose, K; Rosofsky, SG; Ross, MP; Rowan, S; Rudiger, A; Ruggi, P; Rutins, G; Ryan, K; Sachdev, S; Sadecki, T; Sakellariadou, M; Salafia, OS; Salconi, L; Saleem, M; Samajdar, A; Sammut, L; Sanchez, EJ; Sanchez, LE; SanchisGual, N; Sanders, JR; Santiago, KA; Santos, E; Sarin, N; Sassolas, B; Sathyaprakash, BS; Sauter, O; Savage, RL; Schale, P; Scheel, M; Scheuer, J; Schmidt, P; Schnabel, R; Schofield, RMS; Schonbeck, A; Schreiber, E; Schulte, BW; Schutz, BF; Scott, J; Scott, SM; Seidel, E; Sellers, D; Sengupta, AS; Sennett, N; Sentenac, D; Sequino, V; Sergeev, A; Setyawati, Y; Shaddock, DA; Shaffer, T; Shahriar, MS; Shaner, MB; Sharma, A; Sharma, P; Shawhan, P; Shen, H; Shink, R; Shoemaker, DH; Shoemaker, DM; Shukla, K; ShyamSundar, S; Siellez, K; Sieniawska, M; Sigg, D; Singer, LP; Singh, D; Singh, N; Singhal, A; Sintes, AM; Sitmukhambetov, S; Skliris, V; Slagmolen, BJJ; SlavenBlair, TJ; Smith, JR; Smith, RJE; Somala, S; Son, EJ; Soni, S; Sorazu, B; Sorrentino, F; Souradeep, T; Sowell, E; Spencer, AP; Spera, M; Srivastava, AK; Srivastava, V; Staats, K; Stachie, C; Standke, M; Steer, DA; Steinke, M; Steinlechner, J; Steinlechner, S; Steinmeyer, D; 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Venugopalan, G; Verkindt, D; Vetrano, F; Vicere, A; Viets, AD; Vinciguerra, S; Vine, DJ; Vinet, JY; Vitale, S; Vo, T; Vocca, H; Vorvick, C; Vyatchanin, SP; Wade, AR; Wade, LE; Wade, M; Walet, R; Walker, M; Wallace, L; Walsh, S; Wang, H; Wang, JZ; Wang, S; Wang, WH; Wang, YF; Ward, RL; Warden, ZA; Warner, J; Was, M; Watchi, J; Weaver, B; Wei, LW; Weinert, M; Weinstein, AJ; Weiss, R; Wellmann, F; Wen, L; Wessel, EK; Wessels, P; Westhouse, JW; Wette, K; Whelan, JT; Whiting, BF; Whittle, C; Wilken, DM; Williams, D; Williamson, AR; Willis, JL; Willke, B; Winkler, W; Wipf, CC; Wittel, H; Woan, G; Woehler, J; Wofford, JK; Wright, JL; Wu, DS; Wysocki, DM; Xiao, S; Xu, R; Yamamoto, H; Yancey, CC; Yang, L; Yang, Y; Yang, Z; Yap, MJ; Yazback, M; Yeeles, DW; Yu, H; Yu, H; Yuen, SHR; Zanolin, M; Zelenova, T; Zendri, JP; Zevin, M; Zhang, J; Zhang, L; Zhang, T; Zhao, C; Zhao, G; Zhou, M; Zhou, Z; Zhu, XJ; Zimmerman, AB; Zucker, ME; Zweizig, J; Collaboration, LIGOS; Collaboration, LIGOS; Collaboration, V
This paper presents the gravitationalwave measurement of the Hubble constant (H0) using the detections from the first and second observing runs of the Advanced LIGO and Virgo detector network. The presence of the transient electromagnetic counterpart of the binary neutron star GW170817 led to the first standardsiren measurement of H0. Here we additionally use binary black hole detections in conjunction with galaxy catalogs and report a joint measurement. Our updated measurement is H0 = ${69}_{8}^{+16}$ km s−1 Mpc−1 (68.3% of the highest density posterior interval with a flatinlog prior) which is an improvement by a factor of 1.04 (about 4%) over the GW170817only value of ${69}_{8}^{+17}$ km s−1 Mpc−1. A significant additional contribution currently comes from GW170814, a loud and welllocalized detection from a part of the sky thoroughly covered by the Dark Energy Survey. With numerous detections anticipated over the upcoming years, an exhaustive understanding of other systematic effects are also going to become increasingly important. These results establish the path to cosmology using gravitationalwave observations with and without transient electromagnetic counterparts.
Mon, 01 Mar 2021 00:00:00 GMT
https://qmro.qmul.ac.uk/xmlui/handle/123456789/71622
20210301T00:00:00Z

A robust information life cycle management framework for securing and governing critical infrastructure systems
https://qmro.qmul.ac.uk/xmlui/handle/123456789/71545
A robust information life cycle management framework for securing and governing critical infrastructure systems
Moulos, V; Chatzikyriakos, G; Kassouras, V; Doulamis, A; Doulamis, N; Leventakis, G; Florakis, T; Varvarigou, T; Mitsokapas, E; Kioumourtzis, G; Klirodetis, P; Psychas, A; Marinakis, A; Sfetsos, T; Koniaris, A; Liapis, D; Gatzioura, A
In modern societies, the rampant growth of the Internet, both on the technological and social level, has created fertile ground for the emergence of new types of risk. On top of that, it enhances preexisting threats by offering new means for accessing and exploiting Critical Infrastructures. As the kinds of potential threats evolve, the security, safety and resilience of these infrastructures must be updated accordingly, both at a prevention, as well as a realtime confrontation level. Our research approaches the security of these infrastructures with a focus on the data and utilization of every possible piece of information that derives from this ecosystem. Such a task is quite daunting, since the quantity of data that requires processing resides in the Big Dataspace. To address this, we introduce a new welldefined Information Life Cycle in order to properly model and optimise the way information flows through a modern security system. This life cycle covers all the possible stages, starting from the collection phase up until the exploitation of information intelligence. That ensures the efficiency of data processing and filtering while increasing both the veracity and validity of the final outcome. In addition, an agile Framework is introduced that is optimised to take full advantage of the Information Life Cycle. As a result, it exploits the generated knowledge taking the correct sequence of actions that will successfully address possible threats. This Framework leverages every possible data source that could provide vital information to Critical Infrastructures by performing analysis and data fusion being able to cope with data variety and variability. At the same time, it orchestrates the preexisting processes and resources of these infrastructures. Through rigorous testing, it was found that response time against hazards was dramatically decreased. As a result, this Framework is an ideal candidate for strengthening and shielding the infrastructures’ resilience while improving management of the resources used.
Sat, 01 Dec 2018 00:00:00 GMT
https://qmro.qmul.ac.uk/xmlui/handle/123456789/71545
20181201T00:00:00Z