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3. Gaia Data Release 1. Testing the parallaxes with local Cepheids and RR Lyrae stars

Author

Gaia Collaboration, Clementini, G., Eyer, L., Ripepi, V., Marconi, M., Muraveva, T., Garofalo, A., Sarro, L. M., Palmer, M., Luri, X., Molinaro, R., Rimoldini, L., Szabados, L., Musella, I., Anderson, R. I., Prusti, T., de Bruijne, J. H. J., Brown, A. G. A., Vallenari, A., Babusiaux, C., Bailer-Jones, C. A. L., Bastian, U., Biermann, M., Evans, D. W., Jansen, F., Jordi, C., Klioner, S. A., Lammers, U., Lindegren, L., Mignard, F., Panem, C., Pourbaix, D., Randich, S., Sartoretti, P., Siddiqui, H. I., Soubiran, C., Valette, V., van Leeuwen, F., Walton, N. A., Aerts, C., Arenou, F., Cropper, M., Drimmel, R., Høg, E., Katz, D., Lattanzi, M. G., O'Mullane, W., Grebel, E. K., Holland, A. D., Huc, C., Passot, X., Perryman, M., Bramante, L., Cacciari, C., Castañeda, J., Chaoul, L., Cheek, N., De Angeli, F., Fabricius, C., Guerra, R., Hernández, J., Jean-Azntoine-Piccolo, A., Masana, E., Messineo, R., Mowlavi, N., Nienartowicz, K., Ordóñez-Blanco, D., Panuzzo, P., Portell, J., Richards, P. J., Riello, M., Seabroke, G. M., Tanga, P., Thévenin, F., Torra, J., Els, S. G., Gracia-Abril, G., Comoretto, G., Garcia-Reinaldos, M., Lock, T., Mercier, E., Altmann, M., Andrae, R., Astraatmadja, T. L., Bellas-Velidis, I., Benson, K., Berthier, J., Blomme, R., Busso, G., Carry, B., Cellino, A., Cowell, S., Creevey, O., Cuypers, J., Davidson, M., De Ridder, J., de Torres, A., Delchambre, L., Dell'Oro, A., Ducourant, C., Frémat, Y., García-Torres, M., Gosset, E., Halbwachs, J. -L., Hambly, N. C., Harrison, D. L., Hauser, M., Hestroffer, D., Hodgkin, S. T., Huckle, H. E., Hutton, A., Jasniewicz, G., Jordan, S., Kontizas, M., Korn, A. J., Lanzafame, A. C., Manteiga, M., Moitinho, A., Muinonen, K., Osinde, J., Pancino, E., Pauwels, T., Petit, J. -M., Recio-Blanco, A., Robin, A. C., Siopis, C., Smith, M., Smith, K. W., Sozzetti, A., Thuillot, W., van Reeven, W., Viala, Y., Abbas, U., Aramburu, A. Abreu, Accart, S., Aguado, J. J., Allan, P. M., Allasia, W., Altavilla, G., Álvarez, M. A., Alves, J., Andrei, A. H., Varela, E. Anglada, Antiche, E., Antoja, T., Antón, S., Arcay, B., Bach, N., Baker, S. G., Balaguer-Núñez, L., Barache, C., Barata, C., Barbier, A., Barblan, F., Navascués, D. Barrado y, Barros, M., Barstow, M. A., Becciani, U., Bellazzini, M., García, A. Bello, Belokurov, V., Bendjoya, P., Berihuete, A., Bianchi, L., Bienaymé, O., Billebaud, F., Blagorodnova, N., Blanco-Cuaresma, S., Boch, T., Bombrun, A., Borrachero, R., Bouquillon, S., Bourda, G., Bouy, H., Bragaglia, A., Breddels, M. A., Brouillet, N., Brüsemeister, T., Bucciarelli, B., Burgess, P., Burgon, R., Burlacu, A., Busonero, D., Buzzi, R., Caffau, E., Cambras, J., Campbell, H., Cancelliere, R., Cantat-Gaudin, T., Carlucci, T., Carrasco, J. M., Castellani, M., Charlot, P., Charnas, J., Chiavassa, A., Clotet, M., Cocozza, G., Collins, R. S., Costigan, G., Crifo, F., Cross, N. J. G., Crosta, M., Crowley, C., Dafonte, C., Damerdji, Y., Dapergolas, A., David, P., David, M., De Cat, P., de Felice, F., de Laverny, P., De Luise, F., De March, R., de Souza, R., Debosscher, J., del Pozo, E., Delbo, M., Delgado, A., Delgado, H. E., Di Matteo, P., Diakite, S., Distefano, E., Dolding, C., Anjos, S. Dos, Drazinos, P., Durán, J., Dzigan, Y., Edvardsson, B., Enke, H., Evans, N. W., Bontemps, G. Eynard, Fabre, C., Fabrizio, M., Faigler, S., Falcão, A. J., Casas, M. Farràs, Federici, L., Fedorets, G., Fernández-Hernánde, J., Fernique, P., Fienga, A., Figueras, F., Filippi, F., Findeisen, K., Fonti, A., Fouesneau, M., Fraile, E., Fraser, M., Fuchs, J., Gai, M., Galleti, S., Galluccio, L., Garabato, D., García-Sedano, F., Garralda, N., Gavras, P., Gerssen, J., Geyer, R., Gilmore, G., Girona, S., Giuffrida, G., Gomes, M., González-Marcos, A., González-Núñez, J., González-Vidal, J. J., Granvik, M., Guerrier, A., Guillout, P., Guiraud, J., Gúrpide, A., Gutiérrez-Sánchez, R., Guy, L. P., Haigron, R., Hatzidimitriou, D., Haywood, M., Heiter, U., Helmi, A., Hobbs, D., Hofmann, W., Holl, B., Holland, G., Hunt, J. A. S., Hypki, A., Icardi, V., Irwin, M., de Fombelle, G. Jevardat, Jofré, P., Jonker, P. G., Jorissen, A., Julbe, F., Karampelas, A., Kochoska, A., Kohley, R., Kolenberg, K., Kontizas, E., Koposov, S. E., Kordopatis, G., Koubsky, P., Krone-Martins, A., Kudryashova, M., Kull, I., Bachchan, R. K., Lacoste-Seris, F., Lanza, A. F., Lavigne, J. -B., Poncin-Lafitte, C. Le, Lebreton, Y., Lebzelter, T., Leccia, S., Leclerc, N., Lecoeur-Taibi, I., Lemaitre, V., Lenhardt, H., Leroux, F., Liao, S., Licata, E., Lindstrøm, H. E. P., Lister, T. A., Livanou, E., Lobel, A., Löffler, W., López, M., Lorenz, D., MacDonald, I., Fernandes, T. Magalhães, Managau, S., Mann, R. G., Mantelet, G., Marchal, O., Marchant, J. M., Marinoni, S., Marrese, P. M., Marschalkó, G., Marshall, D. J., Martín-Fleitas, J. M., Martino, M., Mary, N., Matijevič, G., Mazeh, T., McMillan, P. J., Messina, S., Michalik, D., Millar, N. R., Miranda, B. M. H., Molina, D., Molinaro, M., Molnár, L., Moniez, M., Montegriffo, P., Mor, R., Mora, A., Morbidelli, R., Morel, T., Morgenthaler, S., Morris, D., Mulone, A. F., Narbonne, J., Nelemans, G., Nicastro, L., Noval, L., Ordénovic, C., Ordieres-Meré, J., Osborne, P., Pagani, C., Pagano, I., Pailler, F., Palacin, H., Palaversa, L., Parsons, P., Pecoraro, M., Pedrosa, R., Pentikäinen, H., Pichon, B., Piersimoni, A. M., Pineau, F. -X., Plachy, E., Plum, G., Poujoulet, E., Prša, A., Pulone, L., Ragaini, S., Rago, S., Rambaux, N., Ramos-Lerate, M., Ranalli, P., Rauw, G., Read, A., Regibo, S., Reylé, C., Ribeiro, R. A., Riva, A., Rixon, G., Roelens, M., Romero-Gómez, M., Rowell, N., Royer, F., Ruiz-Dern, L., Sadowski, G., Sellés, T. Sagristà, Sahlmann, J., Salgado, J., Salguero, E., Sarasso, M., Savietto, H., Schultheis, M., Sciacca, E., Segol, M., Segovia, J. C., Segransan, D., Shih, I-C., Smareglia, R., Smart, R. L., Solano, E., Solitro, F., Sordo, R., Nieto, S. Soria, Souchay, J., Spagna, A., Spoto, F., Stampa, U., Steele, I. A., Steidelmüller, H., Stephenson, C. A., Stoev, H., Suess, F. F., Süveges, M., Surdej, J., Szegedi-Elek, E., Tapiador, D., Taris, F., Tauran, G., Taylor, M. B., Teixeira, R., Terrett, D., Tingley, B., Trager, S. C., Turon, C., Ulla, A., Utrilla, E., Valentini, G., van Elteren, A., Van Hemelryck, E., van Leeuwen, M., Varadi, M., Vecchiato, A., Veljanoski, J., Via, T., Vicente, D., Vogt, S., Voss, H., Votruba, V., Voutsinas, S., Walmsley, G., Weiler, M., Weingrill, K., Wevers, T., Wyrzykowski, Ł., Yoldas, A., Žerjal, M., Zucker, S., Zurbach, C., Zwitter, T., Alecu, A., Allen, M., Prieto, C. Allende, Amorim, A., Anglada-Escudé, G., Arsenijevic, V., Azaz, S., Balm, P., Beck, M., Bernstein, H. -H., Bigot, L., Bijaoui, A., Blasco, C., Bonfigli, M., Bono, G., Boudreault, S., Bressan, A., Brown, S., Brunet, P. -M., Bunclark, P., Buonanno, R., Butkevich, A. G., Carret, C., Carrion, C., Chemin, L., Chéreau, F., Corcione, L., Darmigny, E., de Boer, K. S., de Teodoro, P., de Zeeuw, P. T., Luche, C. Delle, Domingues, C. D., Dubath, P., Fodor, F., Frézouls, B., Fries, A., Fustes, D., Fyfe, D., Gallardo, E., Gallegos, J., Gardiol, D., Gebran, M., Gomboc, A., Gómez, A., Grux, E., Gueguen, A., Heyrovsky, A., Hoar, J., Iannicola, G., Parache, Y. Isasi, Janotto, A. -M., Joliet, E., Jonckheere, A., Keil, R., Kim, D. -W., Klagyivik, P., Klar, J., Knude, J., Kochukhov, O., Kolka, I., Kos, J., Kutka, A., Lainey, V., LeBouquin, D., Liu, C., Loreggia, D., Makarov, V. V., Marseille, M. G., Martayan, C., Martinez-Rubi, O., Massart, B., Meynadier, F., Mignot, S., Munari, U., Nguyen, A. -T., Nordlander, T., O'Flaherty, K. S., Ocvirk, P., Sanz, A. Olias, Ortiz, P., Osorio, J., Oszkiewicz, D., Ouzounis, A., Park, P., Pasquato, E., Peltzer, C., Peralta, J., Péturaud, F., Pieniluoma, T., Pigozzi, E., Poels, J., Prat, G., Prod'homme, T., Raison, F., Rebordao, J. M., Risquez, D., Rocca-Volmerange, B., Rosen, S., Ruiz-Fuertes, M. I., Russo, F., Sembay, S., Vizcaino, I. Serraller, Short, A., Siebert, A., Silva, H., Sinachopoulos, D., Slezak, E., Soffel, M., Sosnowska, D., Straižys, V., ter Linden, M., Terrell, D., Theil, S., Tiede, C., Troisi, L., Tsalmantza, P., Tur, D., Vaccari, M., Vachier, F., Valles, P., Van Hamme, W., Veltz, L., Virtanen, J., Wallut, J. -M., Wichmann, R., Wilkinson, M. I., Ziaeepour, H., and Zschocke, S.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

Parallaxes for 331 classical Cepheids, 31 Type II Cepheids and 364 RR Lyrae stars in common between Gaia and the Hipparcos and Tycho-2 catalogues are published in Gaia Data Release 1 (DR1) as part of the Tycho-Gaia Astrometric Solution (TGAS). In order to test these first parallax measurements of the primary standard candles of the cosmological distance ladder, that involve astrometry collected by Gaia during the initial 14 months of science operation, we compared them with literature estimates and derived new period-luminosity ($PL$), period-Wesenheit ($PW$) relations for classical and Type II Cepheids and infrared $PL$, $PL$-metallicity ($PLZ$) and optical luminosity-metallicity ($M_V$-[Fe/H]) relations for the RR Lyrae stars, with zero points based on TGAS. The new relations were computed using multi-band ($V,I,J,K_{\mathrm{s}},W_{1}$) photometry and spectroscopic metal abundances available in the literature, and applying three alternative approaches: (i) by linear least squares fitting the absolute magnitudes inferred from direct transformation of the TGAS parallaxes, (ii) by adopting astrometric-based luminosities, and (iii) using a Bayesian fitting approach. TGAS parallaxes bring a significant added value to the previous Hipparcos estimates. The relations presented in this paper represent first Gaia-calibrated relations and form a "work-in-progress" milestone report in the wait for Gaia-only parallaxes of which a first solution will become available with Gaia's Data Release 2 (DR2) in 2018., Comment: 29 pages, 25 figures. Accepted for publication by A&A

Published
2017
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4. Gaia Data Release 1. Open cluster astrometry: performance, limitations, and future prospects

Author

Gaia Collaboration, van Leeuwen, F., Vallenari, A., Jordi, C., Lindegren, L., Bastian, U., Prusti, T., de Bruijne, J. H. J., Brown, A. G. A., Babusiaux, C., Bailer-Jones, C. A. L., Biermann, M., Evans, D. W., Eyer, L., Jansen, F., Klioner, S. A., Lammers, U., Luri, X., Mignard, F., Panem, C., Pourbaix, D., Randich, S., Sartoretti, P., Siddiqui, H. I., Soubiran, C., Valette, V., Walton, N. A., Aerts, C., Arenou, F., Cropper, M., Drimmel, R., Høg, E., Katz, D., Lattanzi, M. G., O'Mullane, W., Grebel, E. K., Holland, A. D., Huc, C., Passot, X., Perryman, M., Bramante, L., Cacciari, C., Castañeda, J., Chaoul, L., Cheek, N., De Angeli, F., Fabricius, C., Guerra, R., Hernández, J., Jean-Antoine-Piccolo, A., Masana, E., Messineo, R., Mowlavi, N., Nienartowicz, K., Ordóñez-Blanco, D., Panuzzo, P., Portell, J., Richards, P. J., Riello, M., Seabroke, G. M., Tanga, P., Thévenin, F., Torra, J., Els, S. G., Gracia-Abril, G., Comoretto, G., Garcia-Reinaldos, M., Lock, T., Mercier, E., Altmann, M., Andrae, R., Astraatmadja, T. L., Bellas-Velidis, I., Benson, K., Berthier, J., Blomme, R., Busso, G., Carry, B., Cellino, A., Clementini, G., Cowell, S., Creevey, O., Cuypers, J., Davidson, M., De Ridder, J., de Torres, A., Delchambre, L., Dell'Oro, A., Ducourant, C., Frémat, Y., García-Torres, M., Gosset, E., Halbwachs, J. -L., Hambly, N. C., Harrison, D. L., Hauser, M., Hestroffer, D., Hodgkin, S. T., Huckle, H. E., Hutton, A., Jasniewicz, G., Jordan, S., Kontizas, M., Korn, A. J., Lanzafame, A. C., Manteiga, M., Moitinho, A., Muinonen, K., Osinde, J., Pancino, E., Pauwels, T., Petit, J. -M., Recio-Blanco, A., Robin, A. C., Sarro, L. M., Siopis, C., Smith, M., Smith, K. W., Sozzetti, A., Thuillot, W., van Reeven, W., Viala, Y., Abbas, U., Aramburu, A. Abreu, Accart, S., Aguado, J. J., Allan, P. M., Allasia, W., Altavilla, G., Álvarez, M. A., Alves, J., Anderson, R. I., Andrei, A. H., Varela, E. Anglada, Antiche, E., Antoja, T., Antón, S., Arcay, B., Bach, N., Baker, S. G., Balaguer-Núñez, L., Barache, C., Barata, C., Barbier, A., Barblan, F., Navascués, D. Barrado y, Barros, M., Barstow, M. A., Becciani, U., Bellazzini, M., García, A. Bello, Belokurov, V., Bendjoya, P., Berihuete, A., Bianchi, L., Bienaymé, O., Billebaud, F., Blagorodnova, N., Blanco-Cuaresma, S., Boch, T., Bombrun, A., Borrachero, R., Bouquillon, S., Bourda, G., Bouy, H., Bragaglia, A., Breddels, M. A., Brouillet, N., Brüsemeister, T., Bucciarelli, B., Burgess, P., Burgon, R., Burlacu, A., Busonero, D., Buzzi, R., Caffau, E., Cambras, J., Campbell, H., Cancelliere, R., Cantat-Gaudin, T., Carlucci, T., Carrasco, J. M., Castellani, M., Charlot, P., Charnas, J., Chiavassa, A., Clotet, M., Cocozza, G., Collins, R. S., Costigan, G., Crifo, F., Cross, N. J. G., Crosta, M., Crowley, C., Dafonte, C., Damerdji, Y., Dapergolas, A., David, P., David, M., De Cat, P., de Felice, F., de Laverny, P., De Luise, F., De March, R., de Martino, D., de Souza, R., Debosscher, J., del Pozo, E., Delbo, M., Delgado, A., Delgado, H. E., Di Matteo, P., Diakite, S., Distefano, E., Dolding, C., Anjos, S. Dos, Drazinos, P., Durán, J., Dzigan, Y., Edvardsson, B., Enke, H., Evans, N. W., Bontemps, G. Eynard, Fabre, C., Fabrizio, M., Faigler, S., Falcão, A. J., Casas, M. Farràs, Federici, L., Fedorets, G., Fernández-Hernández, J., Fernique, P., Fienga, A., Figueras, F., Filippi, F., Findeisen, K., Fonti, A., Fouesneau, M., Fraile, E., Fraser, M., Fuchs, J., Gai, M., Galleti, S., Galluccio, L., Garabato, D., García-Sedano, F., Garofalo, A., Garralda, N., Gavras, P., Gerssen, J., Geyer, R., Gilmore, G., Girona, S., Giuffrida, G., Gomes, M., González-Marcos, A., González-Núñez, J., González-Vidal, J. J., Granvik, M., Guerrier, A., Guillout, P., Guiraud, J., Gúrpide, A., Gutiérrez-Sánchez, R., Guy, L. P., Haigron, R., Hatzidimitriou, D., Haywood, M., Heiter, U., Helmi, A., Hobbs, D., Hofmann, W., Holl, B., Holland, G., Hunt, J. A. S., Hypki, A., Icardi, V., Irwin, M., de Fombelle, G. Jevardat, Jofré, P., Jonker, P. G., Jorissen, A., Julbe, F., Karampelas, A., Kochoska, A., Kohley, R., Kolenberg, K., Kontizas, E., Koposov, S. E., Kordopatis, G., Koubsky, P., Krone-Martins, A., Kudryashova, M., Kull, I., Bachchan, R. K., Lacoste-Seris, F., Lanza, A. F., Lavigne, J. -B., Poncin-Lafitte, C. Le, Lebreton, Y., Lebzelter, T., Leccia, S., Leclerc, N., Lecoeur-Taibi, I., Lemaitre, V., Lenhardt, H., Leroux, F., Liao, S., Licata, E., Lindstrøm, H. E. P., Lister, T. A., Livanou, E., Lobel, A., Löffer, W., López, M., Lorenz, D., MacDonald, I., Fernandes, T. Magalhães, Managau, S., Mann, R. G., Mantelet, G., Marchal, O., Marchant, J. M., Marconi, M., Marinoni, S., Marrese, P. M., Marschalkó, G., Marshall, D. J., Martín-Fleitas, J. M., Martino, M., Mary, N., Matijevič, G., Mazeh, T., McMillan, P. J., Messina, S., Michalik, D., Millar, N. R., Miranda, B. M. H., Molina, D., Molinaro, R., Molinaro, M., Molnár, L., Moniez, M., Montegrio, P., Mor, R., Mora, A., Morbidelli, R., Morel, T., Morgenthaler, S., Morris, D., Mulone, A. F., Muraveva, T., Musella, I., Narbonne, J., Nelemans, G., Nicastro, L., Noval, L., Ordénovic, C., Ordieres-Meré, J., Osborne, P., Pagani, C., Pagano, I., Pailler, F., Palacin, H., Palaversa, L., Parsons, P., Pecoraro, M., Pedrosa, R., Pentikäinen, H., Pichon, B., Piersimoni, A. M., Pineau, F. -X., Plachy, E., Plum, G., Poujoulet, E., Prša, A., Pulone, L., Ragaini, S., Rago, S., Rambaux, N., Ramos-Lerate, M., Ranalli, P., Rauw, G., Read, A., Regibo, S., Reylé, C., Ribeiro, R. A., Rimoldini, L., Ripepi, V., Riva, A., Rixon, G., Roelens, M., Romero-Gómez, M., Rowell, N., Royer, F., Ruiz-Dern, L., Sadowski, G., Sellés, T. Sagristà, Sahlmann, J., Salgado, J., Salguero, E., Sarasso, M., Savietto, H., Schultheis, M., Sciacca, E., Segol, M., Segovia, J. C., Segransan, D., Shih, I-C., Smareglia, R., Smart, R. L., Solano, E., Solitro, F., Sordo, R., Nieto, S. Soria, Souchay, J., Spagna, A., Spoto, F., Stampa, U., Steele, I. A., Steidelmüller, H., Stephenson, C. A., Stoev, H., Suess, F. F., Süveges, M., Surdej, J., Szabados, L., Szegedi-Elek, E., Tapiador, D., Taris, F., Tauran, G., Taylor, M. B., Teixeira, R., Terrett, D., Tingley, B., Trager, S. C., Turon, C., Ulla, A., Utrilla, E., Valentini, G., van Elteren, A., Van Hemelryck, E., van Leeuwen, M., Varadi, M., Vecchiato, A., Veljanoski, J., Via, T., Vicente, D., Vogt, S., Voss, H., Votruba, V., Voutsinas, S., Walmsley, G., Weiler, M., Weingril, K., Wevers, T., Wyrzykowski, Ł., Yoldas, A., Žerjal, M., Zucker, S., Zurbach, C., Zwitter, T., Alecu, A., Allen, M., Prieto, C. Allende, Amorim, A., Anglada-Escudé, G., Arsenijevic, V., Azaz, S., Balm, P., Beck, M., Bernsteiny, H. -H., Bigot, L., Bijaoui, A., Blasco, C., Bonfigli, M., Bono, G., Boudreault, S., Bressan, A., Brown, S., Brunet, P. -M., Bunclarky, P., Buonanno, R., Butkevich, A. G., Carret, C., Carrion, C., Chemin, L., Chéreau, F., Corcione, L., Darmigny, E., de Boer, K. S., de Teodoro, P., de Zeeuw, P. T., Luche, C. Delle, Domingues, C. D., Dubath, P., Fodor, F., Frézouls, B., Fries, A., Fustes, D., Fyfe, D., Gallardo, E., Gallegos, J., Gardio, D., Gebran, M., Gomboc, A., Gómez, A., Grux, E., Gueguen, A., Heyrovsky, A., Hoar, J., Iannicola, G., Parache, Y. Isasi, Janotto, A. -M., Joliet, E., Jonckheere, A., Keil, R., Kim, D. -W., Klagyivik, P., Klar, J., Knude, J., Kochukhov, O., Kolka, I., Kos, J., Kutka, A., Lainey, V., LeBouquin, D., Liu, C., Loreggia, D., Makarov, V. V., Marseille, M. G., Martayan, C., Martinez-Rubi, O., Massart, B., Meynadier, F., Mignot, S., Munari, U., Nguyen, A. -T., Nordlander, T., O'Flaherty, K. S., Ocvirk, P., Sanz, A. Olias, Ortiz, P., Osorio, J., Oszkiewicz, D., Ouzounis, A., Palmer, M., Park, P., Pasquato, E., Peltzer, C., Peralta, J., Péturaud, F., Pieniluoma, T., Pigozzi, E., Poelsy, J., Prat, G., Prod'homme, T., Raison, F., Rebordao, J. M., Risquez, D., Rocca-Volmerange, B., Rosen, S., Ruiz-Fuertes, M. I., Russo, F., Sembay, S., Vizcaino, I. Serraller, Short, A., Siebert, A., Silva, H., Sinachopoulos, D., Slezak, E., Soffel, M., Sosnowska, D., Straižys, V., ter Linden, M., Terrell, D., Theil, S., Tiede, C., Troisi, L., Tsalmantza, P., Tur, D., Vaccari, M., Vachier, F., Valles, P., Van Hamme, W., Veltz, L., Virtanen, J., Wallut, J. -M., Wichmann, R., Wilkinson, M. I., Ziaeepour, H., and Zschocke, S.

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

Context. The first Gaia Data Release contains the Tycho-Gaia Astrometric Solution (TGAS). This is a subset of about 2 million stars for which, besides the position and photometry, the proper motion and parallax are calculated using Hipparcos and Tycho-2 positions in 1991.25 as prior information. Aims. We investigate the scientific potential and limitations of the TGAS component by means of the astrometric data for open clusters. Methods. Mean cluster parallax and proper motion values are derived taking into account the error correlations within the astrometric solutions for individual stars, an estimate of the internal velocity dispersion in the cluster, and, where relevant, the effects of the depth of the cluster along the line of sight. Internal consistency of the TGAS data is assessed. Results. Values given for standard uncertainties are still inaccurate and may lead to unrealistic unit-weight standard deviations of least squares solutions for cluster parameters. Reconstructed mean cluster parallax and proper motion values are generally in very good agreement with earlier Hipparcos-based determination, although the Gaia mean parallax for the Pleiades is a significant exception. We have no current explanation for that discrepancy. Most clusters are observed to extend to nearly 15 pc from the cluster centre, and it will be up to future Gaia releases to establish whether those potential cluster-member stars are still dynamically bound to the clusters. Conclusions. The Gaia DR1 provides the means to examine open clusters far beyond their more easily visible cores, and can provide membership assessments based on proper motions and parallaxes. A combined HR diagram shows the same features as observed before using the Hipparcos data, with clearly increased luminosities for older A and F dwarfs., Comment: Accepted for publication by A&A. 21 pages main text plus 46 pages appendices. 34 figures main text, 38 figures appendices. 8 table in main text, 19 tables in appendices

Published
2017
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5. Gaia Data Release 1: The variability processing & analysis and its application to the south ecliptic pole region

Author

Eyer, L., Mowlavi, N., Evans, D. W., Nienartowicz, K., Ordonez, D., Holl, B., Lecoeur-Taibi, I., Riello, M., Clementini, G., Cuypers, J., De Ridder, J., Lanzafame, A. C., Sarro, L. M., Charnas, J., Guy, L. P., de Fombelle, G. Jevardat, Rimoldini, L., Süveges, M., Mignard, F., Busso, G., De Angeli, F., van Leeuwen, F., Dubath, P., Beck, M., Aguado, J. J., Debosscher, J., Distefano, E., Fuchs, J., Koubsky, P., Lebzelter, T., Leccia, S., Lopez, M., Moitinho, A., Regibo, S., Ripepi, V., Roelens, M., Szabados, L., Tingley, B., Votruba, V., Zucker, S., Aerts, C., Barblan, F., Blanco-Cuaresma, S., Grenon, M., Jan, A., Lorenz, D., Miranda, B., Morgenthaler, S., Ordenovic, C., Palaversa, L., Prsa, A., Ruiz-Fuertes, M. I., Anderson, R. I., Delgado, H. E., Dzigan, Y., Hudec, R., Jonckheere, A., Klagyivik, P., Kutka, A., Moniez, M., Nicoletti, J. -M., Park, P., Van Hemelryck, E., Varadi, M., Kochoska, A., Lanza, A. F., Marconi, M., Marschalko, G., Messina, S., Musella, I., Pagano, I., Sadowski, G., and Schultheis, M.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract

The ESA Gaia mission provides a unique time-domain survey for more than one billion sources brighter than G=20.7 mag. Gaia offers the unprecedented opportunity to study variability phenomena in the Universe thanks to multi-epoch G-magnitude photometry in addition to astrometry, blue and red spectro-photometry, and spectroscopy. Within the Gaia Consortium, Coordination Unit 7 has the responsibility to detect variable objects, classify them, derive characteristic parameters for specific variability classes, and provide global descriptions of variable phenomena. We describe the variability processing and analysis that we plan to apply to the successive data releases, and we present its application to the G-band photometry results of the first 14 months of Gaia operations that comprises 28 days of Ecliptic Pole Scanning Law and 13 months of Nominal Scanning Law. Out of the 694 million, all-sky, sources that have calibrated G-band photometry in this first stage of the mission, about 2.3 million sources that have at least 20 observations are located within 38 degrees from the South Ecliptic Pole. We detect about 14% of them as variable candidates, among which the automated classification identified 9347 Cepheid and RR Lyrae candidates. Additional visual inspections and selection criteria led to the publication of 3194 Cepheid and RR Lyrae stars, described in Clementini et al. (2016). Under the restrictive conditions for DR1, the completenesses of Cepheids and RR Lyrae stars are estimated at 67% and 58%, respectively, numbers that will significantly increase with subsequent Gaia data releases. Data processing within the Gaia Consortium is iterative, the quality of the data and the results being improved at each iteration. The results presented in this article show a glimpse of the exceptional harvest that is to be expected from the Gaia mission for variability phenomena. [abridged], Comment: 40 pages, 46 figures. Submitted to A&A

Published
2017

10. Active screening for COPD among hospitalized smokers – a feasibility study

Author

Katarzyna Mycroft, Piotr Korczynski, Piotr Jankowski, Mikolaj Kutka, Olga Zelazna, Marcin Zagaja, Kornelia Wozniczko, Urszula Szafranska, Lukasz Koltowski, Grzegorz Opolski, Rafal Krenke, and Katarzyna Gorska

Subjects
Therapeutics. Pharmacology, RM1-950
Abstract

Background: Spirometry is a primary tool for early chronic obstructive pulmonary disease (COPD) detection in patients with risk factors, for example, cigarette smoking. The aim of this study was to evaluate the strategy of an active screening for COPD among smokers admitted to the pulmonary and cardiology department. Methods: This prospective study was conducted between February and March 2019. All hospitalized smokers aged 40 years and older completed an original questionnaire and had spirometry measurement with a bronchial reversibility test (if applicable) performed by medical students using a portable spirometer. Results: One hundred and eighty-eight patients were eligible to participate in the study. Seventy (37%) subjects refused to participate. Eventually, 116 (62%) patients were included in the final analysis and 94 (81%) performed spirometry correctly. In total, 32 (34 %) patients were found to have COPD. Nine (28%) of these patients were newly diagnosed, 89% of them had mild-to-moderate airway obstruction. Patients with newly diagnosed COPD were significantly younger [age 63 (56–64) versus 69 (64–78) years], had a longer smoking-free period [17 (13–20) versus 9 (2–12) years], had fewer symptoms and had a better lung function compared with patients with a previous diagnosis of COPD ( p

Published
2020
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11. RELAÇÃO ENTRE OS SERVIÇOS FORNECIDOS PELA ATENÇÃO PRIMÁRIA E O CUIDADO INTEGRAL DA POPULAÇÃO: UMA REVISÃO INTEGRATIVA

Author

Costa, Kauê Contro, primary, Gaban, Roberta Del Monaco, additional, Lourenço, Múcio Cevulla da Silva, additional, Secco, Leonardo Campanharo, additional, Creazzo, Karoline Devus, additional, Ferrante, Sabryna Kutka, additional, Gemignani, Elizabeth Yu Me Yut, additional, and De Alcantara Sousa, Luiz Vinicius, additional

Published
2023
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12. Unraveling the Wide Spectrum of Melanoma Biomarkers

Author

Antonios Revythis, Sidrah Shah, Mikolaj Kutka, Michele Moschetta, Mehmet Akif Ozturk, George Pappas-Gogos, Evangelia Ioannidou, Matin Sheriff, Elie Rassy, and Stergios Boussios

Subjects
melanoma, biomarkers, molecular pathology, genetic mutations, prognosis, Medicine (General), R5-920
Abstract

The use of biomarkers in medicine has become essential in clinical practice in order to help with diagnosis, prognostication and prediction of treatment response. Since Alexander Breslow’s original report on “melanoma and prognostic values of thickness”, providing the first biomarker for melanoma, many promising new biomarkers have followed. These include serum markers, such as lactate dehydrogenase and S100 calcium-binding protein B. However, as our understanding of the DNA mutational profile progresses, new gene targets and proteins have been identified. These include point mutations, such as mutations of the BRAF gene and tumour suppressor gene tP53. At present, only a small number of the available biomarkers are being utilised, but this may soon change as more studies are published. The aim of this article is to provide a comprehensive review of melanoma biomarkers and their utility for current and, potentially, future clinical practice.

Published
2021
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15. Parámetros bioquímicos y cinéticos usando compuestos de yodo radioactivo en un grupo de personas pertenecientes a una región bociosa de Colombia

Author

M. Kutka, J. R. Posada, and I. L. de Betancourt

Subjects
yodo radioactivo, bocio endémico, factores bociógenos, Diseases of the endocrine glands. Clinical endocrinology, RC648-665
Abstract

Fragmento De estudios sobre el bocio endémico se deduce que sus causas más comunes son: 1. Deficiencia de yodo en la alimentación. 2. Presencia de factores bociógenos en los alimentos; 3. Falla de la biosíntesis hormonal de la tiroides, relacionada, generalmente, con trastornos genéticos. El conocimiento acerca de la deficiencia de yodo resulta del estudio del metabolismo del yodo en el organismo, así como también, de la comparación de la cantidad de yodo existente en la alimentación en regiones bociosas y no bociosas. A pesar de ello, no se ha aclarado cuál es el valor "normal" de la cantidad de yodo necesario diariamente. *Conferencia dictada en la VI reunión anual de la Sociedad Colombiana de Endocrinologia, Bucaramanga 27-29 de noviembre de 1969

Published
2018
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18. Cardiac Stress in High-Risk Patients Undergoing Major Endovascular Surgery—Focus on Diastolic Function

Author

Paweł Andruszkiewicz, Aleksandra Gąsecka, Mateusz Zawadka, P. Dudek, Tomasz Jakimowicz, Jan Poelaert, Michał Marchel, M. Kutka, Laboratory for Experimental Clinical Chemistry, Laboratory for General Clinical Chemistry, and Faculty of Medicine and Pharmacy

Subjects
heart failure with preserved ejection fraction, medicine.medical_specialty, Systole, medicine.medical_treatment, Diastole, 030204 cardiovascular system & hematology, surgery, 03 medical and health sciences, Aortic aneurysm, 0302 clinical medicine, Aneurysm, 030202 anesthesiology, medicine.artery, Internal medicine, Natriuretic Peptide, Brain, Troponin I, medicine, Humans, Prospective Studies, cardiovascular diseases, Superior mesenteric artery, N-terminal pro-B-type natriuretic peptide, biology, troponin, business.industry, diastolic function, Stent, Perioperative, medicine.disease, Troponin, Peptide Fragments, Anesthesiology and Pain Medicine, Echocardiography, NT-proBNP, aneurysm, cardiovascular system, biology.protein, Cardiology, endovascular, Poland, Cardiology and Cardiovascular Medicine, business, Biomarkers
Abstract

Objectives The purpose of this study was to determine the relationship between the changes in diastolic function and their association with cardiac biomarkers in the perioperative period in patients undergoing complex endovascular aortic repair. Design Prospective observational study. Setting Single-center academic hospital, central teaching hospital in Warsaw, Poland. Participants The study comprised 27 high-risk patients scheduled for elective endovascular repair of aortic aneurysm. Interventions Complex endovascular procedure using branched endograft of the thoracoabdominal aorta. Branches of the stent grafts included renal arteries, the superior mesenteric artery, and the celiac trunk. Measurements and Main Results The primary outcome was to evaluate changes in diastolic function parameters assessed with transthoracic echocardiography at two and 24 hours postoperatively. The major secondary outcomes were changes in N-terminal pro-B-type natriuretic peptide (NT-proBNP) and troponin I concentrations, systolic function parameters, hemodynamic parameters at two and 24 hours, length of hospital stay, and 30-day mortality. There was a reduction in e’ wave velocity on both the septal and lateral sides at two hours compared with the baseline (p = 0.041 and p = 0.05, respectively). There was an increase in both NT-proBNP and troponin I concentrations after surgery (p = 0.002 and p = 0.034, respectively), with troponin I peaking two hours after surgery and NT-proBNP peaking 24 hours after surgery. Conclusions Patients undergoing a branched endovascular aortic repair of a thoracoabdominal aortic aneurysm experience a cardiac insult that manifests with deterioration in diastolic parameters and concomitant increases of troponin and NT-proBNP concentrations. Additional large-scale prospective studies are required to confirm this phenomenon.

Published
2021
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22. Maintaining America's Egalitarian Edge in the 21st Century: Unifying K-12 and Postsecondary Education for the Success of All Students

Author

Hoyle, John R. and Kutka, Timothy M.

Abstract

Futurists, policy makers, and other stakeholders propose sweeping reforms of the American education system. However, there is little evidence that the current add-on, underfunded system will reverse the failure pattern among children of color and those living in poverty. This article presents a dramatic and feasible proposal to establish a collaborative learning community to improve all levels of education by combining the public schools and higher education. A unified education system would blend ongoing efforts in the PK-16 movement with International Baccalaureate, Advance Placement, and other public school-higher education links into a new seamless system with instruction, curriculum, and technology that would produce independent, productive learners in all racial and ethic groups beginning at age 3 and continuing though graduate education. The article reviews research efforts to build partnerships between public schools and higher education and ends with a futuristic scenario of a successful unified system in 2035.

Published
2008
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25. Epithelial Ovarian Cancer: Providing Evidence of Predisposition Genes

Author

Sidrah Shah, Alison Cheung, Mikolaj Kutka, Matin Sheriff, and Stergios Boussios

Subjects
Ovarian Neoplasms, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, High-Throughput Nucleotide Sequencing, Humans, Female, Carcinoma, Ovarian Epithelial, Poly(ADP-ribose) Polymerase Inhibitors, Poly(ADP-ribose) Polymerases
Abstract

Epithelial ovarian cancer (EOC) is one of the cancers most influenced by hereditary factors. A fourth to a fifth of unselected EOC patients carry pathogenic variants (PVs) in a number of genes, the majority of which encode for proteins involved in DNA mismatch repair (MMR) pathways. PVs in BRCA1 and BRCA2 genes are responsible for a substantial fraction of hereditary EOC. In addition, PV genes involved in the MMR pathway account for 10–15% of hereditary EOC. The identification of women with homologous recombination (HR)-deficient EOCs has significant clinical implications, concerning chemotherapy regimen planning and development as well as the use of targeted therapies such as poly(ADP-ribose) polymerase (PARP) inhibitors. With several genes involved, the complexity of genetic testing increases. In this context, next-generation sequencing (NGS) allows testing for multiple genes simultaneously with a rapid turnaround time. In this review, we discuss the EOC risk assessment in the era of NGS.

Published
2022

27. Overcoming information-sharing challenges in cyber defence exercises

Author

Agnė Brilingaitė, Linas Bukauskas, Aušrius Juozapavičius, and Eduardas Kutka

Subjects
incident information sharing, cyber defence exercises, collaborative learning, informal information exchange, Social Psychology, Computer Networks and Communications, Political Science and International Relations, Computer Science (miscellaneous), Safety, Risk, Reliability and Quality, Law
Abstract

Active usage of threat intelligence information supports effective prevention, mitigation and defence against cyberattacks by threat actors ranging from individual amateurs to state organizations. However, threat intelligence highly depends on security specialists’ ability to share incident data on threat information-sharing platforms. Unfortunately, business managers and educational institutions undervalue the information-sharing aspect when planning the professional development of cybersecurity-related specialists. Consequently, cybersecurity specialists are insufficiently motivated to correctly communicate and propagate relevant information with team members, superiors, relevant institutions and the global community about the impact of the incident. Literature review reveals many technological, legal and psychological obstacles hindering successful information exchange. This research aims to improve threat information sharing by focusing on the educational aspect of the problem and analysing the attitude of cybersecurity specialists during cyber defence exercises (CDX). Our case study disclosed nine factors obstructing both proper reporting to relevant authorities and adequate communication among teams. By addressing these factors, CDX organizers could substantially improve the development of highly beneficial soft skills of the technical specialists.

Published
2022
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35. Unraveling the Wide Spectrum of Melanoma Biomarkers

Author

Revythis, A., Shah, S., Kutka, M., Moschetta, M., Ozturk, M.A., Pappas-Gogos, G., Ioannidou, E., Sheriff, M., Rassy, E., and Boussios, S.

Subjects
biomarkers, genetic mutations, melanoma, molecular pathology, prognosis
Abstract

The use of biomarkers in medicine has become essential in clinical practice in order to help with diagnosis, prognostication and prediction of treatment response. Since Alexander Breslow's original report on "melanoma and prognostic values of thickness", providing the first biomarker for melanoma, many promising new biomarkers have followed. These include serum markers, such as lactate dehydrogenase and S100 calcium-binding protein B. However, as our understanding of the DNA mutational profile progresses, new gene targets and proteins have been identified. These include point mutations, such as mutations of the BRAF gene and tumour suppressor gene tP53. At present, only a small number of the available biomarkers are being utilised, but this may soon change as more studies are published. The aim of this article is to provide a comprehensive review of melanoma biomarkers and their utility for current and, potentially, future clinical practice.

Published
2021

36. Unraveling the Wide Spectrum of Melanoma Biomarkers

Author

Elie El Rassy, George Pappas-Gogos, Stergios Boussios, Mikolaj Kutka, Evangelia Ioannidou, Antonios Revythis, Sidrah Shah, Michele Moschetta, Mehmet Akif Ozturk, and Matin Sheriff

Subjects
0301 basic medicine, Treatment response, Medicine (General), Clinical Biochemistry, Review, genetic mutations, 03 medical and health sciences, 0302 clinical medicine, R5-920, molecular pathology, medicine, melanoma, Gene, Molecular pathology, business.industry, Point mutation, Melanoma, biomarkers, medicine.disease, Clinical Practice, 030104 developmental biology, 030220 oncology & carcinogenesis, Cancer research, Biomarker (medicine), prognosis, business, Serum markers
Abstract

The use of biomarkers in medicine has become essential in clinical practice in order to help with diagnosis, prognostication and prediction of treatment response. Since Alexander Breslow’s original report on “melanoma and prognostic values of thickness”, providing the first biomarker for melanoma, many promising new biomarkers have followed. These include serum markers, such as lactate dehydrogenase and S100 calcium-binding protein B. However, as our understanding of the DNA mutational profile progresses, new gene targets and proteins have been identified. These include point mutations, such as mutations of the BRAF gene and tumour suppressor gene tP53. At present, only a small number of the available biomarkers are being utilised, but this may soon change as more studies are published. The aim of this article is to provide a comprehensive review of melanoma biomarkers and their utility for current and, potentially, future clinical practice.

Published
2021

37. Differing prognostic value of pulse pressure in patients with heart failure with reduced or preserved ejection fraction: results from the MAGGIC individual patient meta-analysis

Author

Jackson, Colette E., Castagno, Davide, Maggioni, Aldo P., Køber, Lars, Squire, Iain B., Swedberg, Karl, Andersson, Bert, Richards, A. Mark, Bayes-Genis, Antoni, Tribouilloy, Christophe, Dobson, Joanna, Ariti, Cono A., Poppe, Katrina K., Earle, Nikki, Whalley, Gillian, Pocock, Stuart J., Doughty, Robert N., McMurray, John J.V., Berry, C., Doughty, R., Granger, C., Køber, L., Massie, B., McAlister, F., McMurray, J., Pocock, S., Poppe, K., Swedberg, K., Somaratne, J., Whalley, G., Ahmed, A., Andersson, B., Bayes-Genis, A., Berry, C., Cowie, M., Cubbon, R., Doughty, R., Ezekowitz, J., Gonzalez-Juanatey, J., Gorini, M., Gotsman, I., Grigorian-Shamagian, L., Guazzi, M., Kearney, M., Køber, L., Komajda, M., di Lenarda, A., Lenzen, M., Lucci, D., Macín, S., Madsen, B., Maggioni, A., Martínez-Sellés, M., McAlister, F., Oliva, F., Poppe, K., Rich, M., Richards, M., Senni, M., Squire, I., Taffet, G., Tarantini, L., Tribouilloy, C., Troughton, R., Tsutsui, H., Whalley, G., Doughty, R., Earle, N., Gamble, G.D., Poppe, K., Whalley, G., Ariti, C., Dobson, J., Pocock, S., Poppe, K., Doughty, R.N., Whalley, G., Andersson, B., Hall, C., Richards, A.M., Troughton, R., Lainchbury, J., Berry, C., Hogg, K., Norrie, J., Stevenson, K., Brett, M., McMurray, J., Pfeffer, M.A., Swedberg, K., Granger, C.B., Held, P., McMurray, J.J.V., Michelson, E.L., Olofsson, B., Östergren, J., Yusuf, S., Køber, L., Torp-Pedersen, C., Lenzen, M.J., Scholte op Reimer, W.J.M., Boersma, E., Vantrimpont, P.J.M.J., Follath, F., Swedberg, K., Cleland, J., Komajda, M., Gotsman, I., Zwas, D., Planer, D., Azaz-Livshits, T., Admon, D., Lotan, C., Keren, A., Grigorian-Shamagian, L., Varela-Roman, A., Mazón-Ramos, P., Rigeiro-Veloso, P., Bandin-Dieguez, M.A., Gonzalez-Juanatey, J.R., Guazzi, M., Myers, J., Arena, R., McAlister, F.A., Ezekowitz, J., Armstrong, P.W., Cujec, Bibiana, Paterson, Ian, Cowie, M.R., Wood, D.A., Coats, A.J.S., Thompson, S.G., Suresh, V., Poole-Wilson, P.A., Sutton, G.C., Martínez-Sellés, M., Robles, J.A.G., Prieto, L., Muñoa, M.D., Frades, E., Díaz-Castro, O., Almendral, J., Tarantini, L., Faggiano, P., Senni, M., Lucci, D., Bertoli, D., Porcu, M., Opasich, C., Tavazzi, L., Maggioni, A.P., Kirk, V., Bay, M., Parner, J., Krogsgaard, K., Herzog, T.M., Boesgaard, S., Hassager, C., Nielsen, O.W., Aldershvile, J., Nielsen, H., Kober, L., Macín, S.M., Perna, E.R., Cimbaro Canella, J.P., Alvarenga, P., Pantich, R., Ríos, N., Farias, E.F., Badaracco, J.R., Madsen, B.K., Hansen, J.F., Stokholm, K.H., Brons, J., Husum, D., Mortensen, L.S., Bayes-Genis, A., Vazquez, R., Puig, T., Fernandez-Palomeque, C., Bardají, A., Pascual-Figal, D., Ordoñez-Llanos, J., Valdes, M., Gabarrus, A., Pavon, R., Pastor, L., Gonzalez-Juanatey, J.R., Almendral, J., Fiol, M., Nieto, V., Macaya, C., Cinca, J., Cygankiewitz, I., Bayes de Luna, A., Newton, J.D., Blackledge, H.M., Squire, I.B., Wright, S.P., Whalley, G.A., Doughty, R.N., Kerzner, R., Gage, B.F., Freedland, K.E., Rich, M.W., Huynh, B.C., Rovner, A., Freedland, K.E., Carney, R.M., Rich, M.W., Taffet, G.E., Teasdale, T.A., Bleyer, A.J., Kutka, N.J., Luchi, R.J., Tribouilloy, C., Rusinaru, D., Mahjoub, H., Soulière, V., Lévy, F., Peltier, M., Tsutsui, H., Tsuchihashi, M., Takeshita, A., MacCarthy, P.A., Kearney, M.T., Nolan, J., Lee, A.J., Prescott, R.J., Shah, A.M., Brooksby, W.P., Fox, K.A.A., Varela-Roman, A., Gonzalez-Juanatey, J.R., Basante, P., Trillo, R., Garcia-Seara, J., Martinez-Sande, J.L., and Gude, F.

Published
2015
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38. Unraveling the Wide Spectrum of Melanoma Biomarkers

Author

Revythis, Antonios, primary, Shah, Sidrah, additional, Kutka, Mikolaj, additional, Moschetta, Michele, additional, Ozturk, Mehmet Akif, additional, Pappas-Gogos, George, additional, Ioannidou, Evangelia, additional, Sheriff, Matin, additional, Rassy, Elie, additional, and Boussios, Stergios, additional

Published
2021
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39. Active screening for COPD among hospitalized smokers – a feasibility study

Author

Marcin Zagaja, Mikolaj Kutka, Urszula Szafranska, Katarzyna Górska, Lukasz Koltowski, Katarzyna Mycroft, Piotr Korczyński, Grzegorz Opolski, Rafał Krenke, Piotr Jankowski, Kornelia Wozniczko, and Olga Zelazna

Subjects
Spirometry, medicine.medical_specialty, portable spirometry, Medicine (miscellaneous), Pulmonary disease, 030204 cardiovascular system & hematology, chronic obstructive pulmonary disease, 03 medical and health sciences, 0302 clinical medicine, Cigarette smoking, Internal medicine, medicine, In patient, misdiagnosis, Original Research, COPD, medicine.diagnostic_test, business.industry, screening, lcsh:RM1-950, fixed airway obstruction, medicine.disease, respiratory tract diseases, lcsh:Therapeutics. Pharmacology, 030228 respiratory system, business
Abstract

Background: Spirometry is a primary tool for early chronic obstructive pulmonary disease (COPD) detection in patients with risk factors, for example, cigarette smoking. The aim of this study was to evaluate the strategy of an active screening for COPD among smokers admitted to the pulmonary and cardiology department. Methods: This prospective study was conducted between February and March 2019. All hospitalized smokers aged 40 years and older completed an original questionnaire and had spirometry measurement with a bronchial reversibility test (if applicable) performed by medical students using a portable spirometer. Results: One hundred and eighty-eight patients were eligible to participate in the study. Seventy (37%) subjects refused to participate. Eventually, 116 (62%) patients were included in the final analysis and 94 (81%) performed spirometry correctly. In total, 32 (34 %) patients were found to have COPD. Nine (28%) of these patients were newly diagnosed, 89% of them had mild-to-moderate airway obstruction. Patients with newly diagnosed COPD were significantly younger [age 63 (56–64) versus 69 (64–78) years], had a longer smoking-free period [17 (13–20) versus 9 (2–12) years], had fewer symptoms and had a better lung function compared with patients with a previous diagnosis of COPD ( p Conclusion: The proposed diagnostic strategy can be successfully used to improve COPD detection in the inpatient setting. The majority of the newly diagnosed COPD patients had mild-to-moderate airway obstruction. Patients who should be particularly screened for COPD include ex-smokers with less pronounced respiratory symptoms.

Published
2020

40. Heart failure in younger patients: the Meta-analysis Global Group in Chronic Heart Failure (MAGGIC)

Author

Wong, Chih M., Hawkins, Nathaniel M., Petrie, Mark C., Jhund, Pardeep S., Gardner, Roy S., Ariti, Cono A., Poppe, Katrina K., Earle, Nikki, Whalley, Gillian A., Squire, Iain B., Doughty, Robert N., McMurray, John J.V., Berry, C., Doughty, R., Granger, C., Køber, L., Massie, B., McAlister, F., McMurray, J., Pocock, S., Poppe, K., Swedberg, K., Somaratne, J., Whalley, G., Ahmed, A., Andersson, B., Bayes-Genis, A., Berry, C., Cowie, M., Cubbon, R., Doughty, R., Ezekowitz, J., Gonzalez-Juanatey, J., Gorini, M., Gotsman, I., Grigorian-Shamagian, L., Guazzi, M., Kearney, M., Køber, L., Komajda, M., di Lenarda, A., Lenzen, M., Lucci, D., Macín, S., Madsen, B., Maggioni, A., Martínez-Sellés, M., McAlister, F., Oliva, F., Poppe, K., Rich, M., Richards, M., Senni, M., Squire, I., Taffet, G., Tarantini, L., Tribouilloy, C., Troughton, R., Tsutsui, H., Whalley, G., Doughty, R., Earle, N., Gamble, G.D., Poppe, K., Whalley, G., Ariti, C., Dobson, J., Pocock, S., Poppe, K., Doughty, R.N., Whalley, G., Andersson, B., Hall, C., Richards, A.M., Troughton, R., Lainchbury, J., Berry, C., Hogg, K., Norrie, J., Stevenson, K., Brett, M., McMurray, J., Pfeffer, M.A., Swedberg, K., Granger, C.B., Held, P., McMurray, J.J.V., Michelson, E.L., Olofsson, B., Östergren, J., Yusuf, S., Køber, L., Torp-Pedersen, C., Ahmed, Ali, Lenzen, M.J., Scholte op Reimer, W.J.M., Boersma, E., Vantrimpont, P.J.M.J., Follath, F., Swedberg, K., Cleland, J., Komajda, M., Gotsman, I., Zwas, D., Planer, D., Azaz-Livshits, T., Admon, D., Lotan, C., Keren, A., Grigorian-Shamagian, L., Varela-Roman, A., Mazón-Ramos, P., Rigeiro-Veloso, P., Bandin-Dieguez, M.A., Gonzalez-Juanatey, J.R., Guazzi, M., Myers, J., Arena, R., McAlister, F.A., Ezekowitz, J., Armstrong, P.W., Cujec, Bibiana, Paterson, Ian, Cowie, M.R., Wood, D.A., Coats, A.J.S., Thompson, S.G., Suresh, V., Poole-Wilson, P.A., Sutton, G.C., Martínez-Sellés, M., Robles, J.A.G., Prieto, L., Muñoa, M.D., Frades, E., Díaz-Castro, O., Almendral, J., Tarantini, L., Faggiano, P., Senni, M., Lucci, D., Bertoli, D., Porcu, M., Opasich, C., Tavazzi, L., Maggioni, A.P., Kirk, V., Bay, M., Parner, J., Krogsgaard, K., Herzog, T.M., Boesgaard, S., Hassager, C., Nielsen, O.W., Aldershvile, J., Nielsen, H., Kober, L., Macín, S.M., Perna, E.R., Cimbaro Canella, J.P., Alvarenga, P., Pantich, R., Ríos, N., Farias, E.F., Badaracco, J.R., Madsen, B.K., Hansen, J.F., Stokholm, K.H., Brons, J., Husum, D., Mortensen, L.S., Bayes-Genis, A., Vazquez, R., Puig, T., Fernandez-Palomeque, C., Bardají, A., Pascual-Figal, D., Ordoñez-Llanos, J., Valdes, M., Gabarrus, A., Pavon, R., Pastor, L., Gonzalez-Juanatey, J.R., Almendral, J., Fiol, M., Nieto, V., Macaya, C., Cinca, J., Bayes de Luna, A., Newton, J.D., Blackledge, H.M., Squire, I.B., Wright, S.P., Whalley, G.A., Doughty, R.N., Kerzner, R., Gage, B.F., Freedland, K.E., Rich, M.W., Huynh, B.C., Rovner, A, Freedland, KE, Carney, RM, Rich, MW, Taffet, GE, Teasdale, T.A., Bleyer, A.J., Kutka, N.J., Luchi, R.J., Tribouilloy, C., Rusinaru, D., Mahjoub, H., Soulière, V., Lévy, F., Peltier, M., Tsutsui, H., Tsuchihashi, M., Takeshita, A., MacCarthy, P.A., Kearney, M.T., Nolan, J., Lee, A.J., Prescott, R.J., Shah, A.M., Brooksby, W.P., Fox, K.A.A., Varela-Roman, A., Gonzalez-Juanatey, J.R., Basante, P., Trillo, R., Garcia-Seara, J., Martinez-Sande, J.L., and Gude, F.

Published
2014
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41. Screening for COPD with a portable spirometer among hospitalised smokers

Author

Piotr Korczyński, Lukasz Koltowski, Katarzyna Mycroft, Piotr Jankowski, Mikolaj Kutka, Kornelia Woźniczko, Olga Żelazna, Marcin Zagaja, Urszula Szafranska, Rafał Krenke, Katarzyna Górska, and Grzegorz Opolski

Subjects
Spirometry, medicine.medical_specialty, COPD, medicine.diagnostic_test, business.industry, medicine.disease, respiratory tract diseases, law.invention, Teaching hospital, Cigarette smoking, law, Internal medicine, medicine, In patient, Prospective cohort study, business, Lung function, Spirometer
Abstract

Background: Spirometry is a primary tool for early COPD detection in patients with risk factors, e.g. cigarette smoking. The aim of this study was to assess the prevalence of COPD among hospitalised smokers and to evaluate the usefulness of a portable spirometer for COPD screening in the inpatient setting. Methods: This prospective study was conducted in two departments of a large multidisciplinary teaching hospital between Jan and Apr 2019. Hospitalised smokers (at least 10 pack-year smoking history) aged at least 40 years who gave their consent to participate in the study were included. All subjects completed an original questionnaire and had spirometry measurement with a bronchial reversibility test (if applicable) performed by medical students using a portable spirometer. Results: Out of 485 hospitalised patients, 188 were smokers aged ≥40 years. Only 116 (62%) subjects agreed to participate in the study. Overall, 95 (82%) spirometry measurements were performed correctly. In total, 32 (34%) subjects had COPD diagnosis, of those, 9 (28%) subjects were newly diagnosed. Patients newly diagnosed with COPD were significantly younger (age 63 (56-64) vs. 69 (64-78) years), had a longer smoking-free period, 17 (13-20) vs. 9 (2-12) years, had less symptoms and had a better lung function compared to patients with a previous diagnosis of COPD (p Conclusions: Patients with COPD risk factors are reluctant to perform spirometry and COPD is highly prevalent among these patients. COPD screening can be successfully performed at patient’s bedside using a portable spirometer and it should also be considered in subjects who have a long smoking-free period and do not report respiratory symptoms.

Published
2020
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42. Evidence quality estimation using selected machine learning approaches

Author

Mikolaj Kutka, Maria Ganzha, Aleksandra Byczynska, and Marcin Paprzycki

Subjects
Multi-label classification, Artificial neural network, business.industry, Computer science, Evidence-based medicine, Machine learning, computer.software_genre, Ensemble learning, Random forest, Support vector machine, sort, Artificial intelligence, business, Grading (education), computer
Abstract

Evidence Based Medicine, is a practice, where medical actions/decisions are undertaken on the basis of best available evidence-based recommendations. In this context, we propose a system for automatic grading of evidence.Evidence grading is approached as a multi-label classification task. Here, classes represent grades, in a widely used Strength of Recommendation Taxonomy (SORT). Numerous ensemble methods are experimented with. It was found that the most successful one used Support Vector Classifiers, trained on multiple high level features, results of which are used to train a Random Forest Classifier. The best achieved accuracy score was 75.41%, which is a significant improvement over the baseline of 48%, achieved by classifying all instances as the majority class. It was also found that the most important predictor is the publication type of articles comprising the body of evidence. The designed system is tuned for use with medical publications and SORT. However, due to it’s generality, it can easily be used with other evidence grading systems.

Published
2020
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43. How many parents give the highest yield in predicted synthetic and composite populations of Maize?

Author

Kutka, F.J. and Smith, M.E.

Subjects
Corn -- Varieties, Crop yields -- Research, Plant breeding -- Research, Agricultural industry, Business
Abstract

Some U.S. farmers are still interested in openpollinated (OP) maize (Zea mays L.), but most varieties are low yielding. How would one develop high-yielding OP varieties, and what are their commercial prospects? To answer this question, we analyzed data from published diallel experiments using Wright's equation. There were seven diallels with inbreds and 14 with populations. The number of inbreds needed to form high yielding synthetics was on average from five to eight lines. The highest predicted yields for composites were on average with three to seven populations. The potential of synthetics and composites as OP varieties in the USA has not been fully examined, though these would probably not be economical for grain in the U.S. Corn Belt. However, their yields may show improvement over current OP varieties and they may be commercially viable in some limited circumstances.

Published
2007

45. Investigation of three-pole oscillation circuit

Author

Narimantas Kutka and Saulius Goceikis

Subjects
multi-pole, three-pole, resonance, resonance circuit, Technology, Science
Abstract

New approach of three-pole electromagnetic wave systems and three-pole resonance is reviewed and new effects are described. With special construction three-pole oscillation circuit are formed superpositional new type electromagnetic wave with new properties. The aim is to that multi-pole oscillation circuit can enter into resonance which my not match any two-pole resonance frequency and thereby shape the new three-pole electromagnetic wave frequency range, i.e. could potentially extend the range of radio waves. The article describes the basics of three-pole mathematics, application aspects, and, using this math, three-pole calculation methodology. Article in Lithuanian Tripolio virpesių kontūro tyrimas Santrauka Pateikiamas naujas superpozicinių elektromagnetinių bangų sistemų ir rezonanso skaičiavimo jose požiūris. Specialios konstrukcijos tripolio virpesių kontūro pagalba formuojamos superpozicinės naujo tipo tripolės elektromagnetines bangos, pasižyminčios unikaliomis savybėmis. Darbo tikslas yra parodyti, kad daugiapolį virpamąjį kontūrą galima įvesti į rezonansą, kuris gali neturėti atitikmens jokio kito dažnio dvipoliam rezonansui ir tuo būdu formuoti naują tripolių elektromagnetinių bangų dažnių diapazoną, t.y. potencialiai išplėsti radijo bangų diapazoną. Aprašomi tripolės matematikos pagrindai, taikymo aspektai, bei, naudojantis šia matematika, tripolio virpesių kontūro rezonanso apskaičiavimo metodika. Reikšminiai žodžiai: daugiapolis, tripolis, rezonansas, virpamasis, kontūras.

Published
2010
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49. Screening for COPD with a portable spirometer among hospitalised smokers

Author

Mycroft, Katarzyna, primary, Jankowski, Piotr, additional, Żelazna, Olga, additional, Zagaja, Marcin, additional, Woźniczko, Kornelia, additional, Szafrańska, Urszula, additional, Kutka, Mikolaj, additional, Korczyński, Piotr, additional, Koltowski, Lukasz, additional, Opolski, Grzegorz, additional, Krenke, Rafal, additional, and Gorska, Katarzyna, additional

Published
2020
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