Extracorporeal CO2 Removal in a Lung Lavage Induced Respiratory Distress Syndrome

Ten pigs with experimental respiratory distress syndrome were treated by extracorporeal CO2 removal (ECCO2-R) combined with low frequency positive pressure ventilation (LPPV). After lung damage had been induced by repeated lung lavages a PEEP trial was conducted in order to find the appropriate PEEP for the damaged lungs. This PEEP was then applied during the ECCO2-R/LPPV period. Blood gas values improved significantly on extracorporeal bypass within a short time (pre-bypass paO2: 54.2 ± 3.7 vs 168.5 ± 31.6 mmHg after 15 min on bypass, p < 0.001) and were kept constant during the next 4 hours. Minute ventilation (MV) was reduced from 4.01 ± 0.31 to 0.74 ± 0.07 l/min (p < 0.0001), FiO2 of the ventilator from 1.0 to 0.46 ± 0.08 (p < 0.0001) whereas FiO2 of the membrane lung (ML) was not changed significantly (FIO2ML 0.59 ± 0.07 vs 0.53 ± 0.06). During controlled mechanical ventilation (CMV), comparable adequate gas exchange was only achieved at a significantly higher mean airway pressure ([Formula: see text] vs 21.2 ± 0.47 cmH20, p < 0.0001). Hemodynamic variables did not change significantly during bypass time. ECCO2-R/LPPV driven by a simple renal perfusion system allows adequate gas exchange in experimental respiratory failure.

Measurement of associated Z + charm production in proton-proton collisions at s = 8 TeV

A study of the associated production of a Z boson and a charm quark jet ( Z + c ), and a comparison to production with a b quark jet ( Z + b ), in p p collisions at a centre-of-mass energy of 8TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7fb - 1 , collected with the CMS detector at the CERN LHC. The Z boson candidates are identified through their decays into pairs of electrons or muons. Jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays of charm hadrons. The measurements are performed in the kinematic region with two leptons withp T ℓ > 20 GeV ,| η ℓ | < 2.1 , 71 < m ℓ ℓ < 111 GeV , and heavy flavour jets withp T jet > 25 GeV and| η jet | < 2.5 . The Z + c production cross section is measured to be σ ( p p → Z + c + X ) B ( Z → ℓ + ℓ - ) = 8.8 ± 0.5 (stat) ± 0.6 (syst) pb . The ratio of the Z + c and Z + b production cross sections is measured to be σ ( p p → Z + c + X ) / σ ( p p → Z + b + X ) = 2.0 ± 0.2 (stat) ± 0.2 (syst) . The Z + c production cross section and the cross section ratio are also measured as a function of the transverse momentum of the Z boson and of the heavy flavour jet. The measurements are compared with theoretical predictions.

Suppression of Excited ϒ States Relative to the Ground State in Pb-Pb Collisions at sqrt[s]_{NN}=5.02 TeV

The relative yields of ϒ mesons produced in pp and Pb-Pb collisions at sqrt[s_{NN}]=5.02  TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, ϒ(2S) and ϒ(3S), to the ground state, ϒ(1S), in both Pb-Pb and pp collisions at the same center-of-mass energy. The double ratios, [ϒ(nS)/ϒ(1S)]_{Pb-Pb}/[ϒ(nS)/ϒ(1S)]_{pp}, are measured to be 0.308±0.055(stat)±0.019(syst) for the ϒ(2S) and less than 0.26 at 95% confidence level for the ϒ(3S). No significant ϒ(3S) signal is found in the Pb-Pb data. The double ratios are studied as a function of collision centrality, as well as ϒ transverse momentum and rapidity. No significant dependencies are observed.

Silva CB, Calpas B, Di Francesco A, Faccioli P, Gallinaro M, Hollar J, Leonardo N, Lloret Iglesias L, Nemallapudi MV, Seixas J, Toldaiev O, Vadruccio D, Varela J, Afanasiev S, Bunin P, Gavrilenko M, Golutvin I, Gorbunov I, Kamenev A, Karjavin V, Lanev A, Malakhov A, Matveev V, Palichik V, Perelygin V, Shmatov S, Shulha S, Skatchkov N, Smirnov V, Voytishin N, Zarubin A, Chtchipounov L, Golovtsov V, Ivanov Y, Kim V, Kuznetsova E, Murzin V, Oreshkin V, Sulimov V, Vorobyev A, Andreev Y, Dermenev A, Gninenko S, Golubev N, Karneyeu A, Kirsanov M, Krasnikov N, Pashenkov A, Tlisov D, Toropin A, Epshteyn V, Gavrilov V, Lychkovskaya N, Popov V, Pozdnyakov I, Safronov G, Spiridonov A, Toms M, Vlasov E, Zhokin A, Aushev T, Bylinkin A, Danilov M, Polikarpov S, Tarkovskii E, Andreev V, Azarkin M, Dremin I, Kirakosyan M, Leonidov A, Terkulov A, Baskakov A, Belyaev A, Boos E, Ershov A, Gribushin A, Khein L, Klyukhin V, Kodolova O, Lokhtin I, Lukina O, Miagkov I, Obraztsov S, Petrushanko S, Savrin V, Snigirev A, Blinov V, Skovpen Y, Shtol D, Azhgirey I, Bayshev I, Bitioukov S, Elumakhov D, Kachanov V, Kalinin A, Konstantinov D, Krychkine V, Petrov V, Ryutin R, Sobol A, Troshin S, Tyurin N, Uzunian A, Volkov A, Adzic P, Cirkovic P, Devetak D, Dordevic M, Milosevic J, Rekovic V, Alcaraz Maestre J, Barrio Luna M, Calvo E, Cerrada M, Chamizo Llatas M, Colino N, De La Cruz B, Delgado Peris A, Del Valle AE, Fernandez Bedoya C, Fernández Ramos JP, Flix J, Fouz MC, Garcia-Abia P, Gonzalez Lopez O, Lopez SG, Hernandez JM, Josa MI, De Martino EN, Pérez-Calero Yzquierdo A, Puerta Pelayo J, Quintario Olmeda A, Redondo I, Romero L, Soares MS, Albajar C, de Trocóniz JF, Missiroli M, Moran D, Cuevas J, Fernandez Menendez J, Gonzalez Caballero I, González Fernández JR, Palencia Cortezon E, Sanchez Cruz S, Suárez Andrés I, Vischia P, Vizan Garcia JM, Cabrillo IJ, Calderon A, Curras E, Fernandez M, Garcia-Ferrero J, Gomez G, Lopez Virto A, Marco J, Martinez Rivero C, Matorras F, Piedra Gomez J, Rodrigo T, Ruiz-Jimeno A, Scodellaro L, Trevisani N, Vila I, Vilar Cortabitarte R, Abbaneo D, Auffray E, Auzinger G, Baillon P, Ball AH, Barney D, Bloch P, Bocci A, Botta C, Camporesi T, Castello R, Cepeda M, Cerminara G, Chen Y, d’Enterria D, Dabrowski A, Daponte V, David A, De Gruttola M, De Roeck A, Di Marco E, Dobson M, Dorney B, du Pree T, Duggan D, Dünser M, Dupont N, Elliott-Peisert A, Everaerts P, Fartoukh S, Franzoni G, Fulcher J, Funk W, Gigi D, Gill K, Girone M, Glege F, Gulhan D, Gundacker S, Guthoff M, Harris P, Hegeman J, Innocente V, Janot P, Kieseler J, Kirschenmann H, Knünz V, Kornmayer A, Kortelainen MJ, Kousouris K, Krammer M, Lange C, Lecoq P, Lourenço C, Lucchini MT, Malgeri L, Mannelli M, Martelli A, Meijers F, Merlin JA, Mersi S, Meschi E, Milenovic P, Moortgat F, Morovic S, Mulders M, Neugebauer H, Orfanelli S, Orsini L, Pape L, Perez E, Peruzzi M, Petrilli A, Petrucciani G, Pfeiffer A, Pierini M, Racz A, Reis T, Rolandi G, Rovere M, Sakulin H, Sauvan JB, Schäfer C, Schwick C, Seidel M, Sharma A, Silva P, Sphicas P, Steggemann J, Stoye M, Takahashi Y, Tosi M, Treille D, Triossi A, Tsirou A, Veckalns V, Veres GI, Verweij M, Wardle N, Wöhri HK, Zagozdzinska A, Zeuner WD, Bertl W, Deiters K, Erdmann W, Horisberger R, Ingram Q, Kaestli HC, Kotlinski D, Langenegger U, Rohe T, Wiederkehr SA, Bachmair F, Bäni L, Bianchini L, Casal B, Dissertori G, Dittmar M, Donegà M, Grab C, Heidegger C, Hits D, Hoss J, Kasieczka G, Lustermann W, Mangano B, Marionneau M, del Arbol PMR, Masciovecchio M, Meinhard MT, Meister D, Micheli F, Musella P, Nessi-Tedaldi F, Pandolfi F, Pata J, Pauss F, Perrin G, Perrozzi L, Quittnat M, Rossini M, Schönenberger M, Starodumov A, Tavolaro VR, Theofilatos K, Wallny R, Aarrestad TK, Amsler C, Caminada L, Canelli MF, De Cosa A, Galloni C, Hinzmann A, Hreus T, Kilminster B, Ngadiuba J, Pinna D, Rauco G, Robmann P, Salerno D, Seitz C, Yang Y, Zucchetta A, Candelise V, Doan TH, Jain S, Khurana R, Konyushikhin M, Kuo CM, Lin W, Pozdnyakov A, Yu SS, Kumar A, Chang P, Chang YH, Chao Y, Chen KF, Chen PH, Fiori F, Hou WS, Hsiung Y, Liu YF, Lu RS, Miñano Moya M, Paganis E, Psallidas A, Tsai JF, Asavapibhop B, Singh G, Srimanobhas N, Suwonjandee N, Adiguzel A, Cerci S, Damarseckin S, Demiroglu ZS, Dozen C, Dumanoglu I, Girgis S, Gokbulut G, Guler Y, Hos I, Kangal EE, Kara O, Topaksu AK, Kiminsu U, Oglakci M, Onengut G, Ozdemir K, Cerci DS, Topakli H, Turkcapar S, Zorbakir IS, Zorbilmez C, Bilin B, Bilmis S, Isildak B, Karapinar G, Yalvac M, Zeyrek M, Gülmez E, Kaya M, Kaya O, Yetkin EA, Yetkin T, Cakir A, Cankocak K, Sen S, Grynyov B, Levchuk L, Sorokin P, Aggleton R, Ball F, Beck L, Brooke JJ, Burns D, Clement E, Cussans D, Flacher H, Goldstein J, Grimes M, Heath GP, Heath HF, Jacob J, Kreczko L, Lucas C, Newbold DM, Paramesvaran S, Poll A, Sakuma T, Seif El Nasr-storey S, Smith D, Smith VJ, Bell KW, Belyaev A, Brew C, Brown RM, Calligaris L, Cieri D, Cockerill DJA, Coughlan JA, Harder K, Harper S, Olaiya E, Petyt D, Shepherd-Themistocleous CH, Thea A, Tomalin IR, Williams T, Baber M, Bainbridge R, Buchmuller O, Bundock A, Burton D, Casasso S, Citron M, Colling D, Corpe L, Dauncey P, Davies G, De Wit A, Della Negra M, Di Maria R, Dunne P, Elwood A, Futyan D, Haddad Y, Hall G, Iles G, James T, Lane R, Laner C, Lucas R, Lyons L, Magnan AM, Malik S, Mastrolorenzo L, Nash J, Nikitenko A, Pela J, Penning B, Pesaresi M, Raymond DM, Richards A, Rose A, Scott E, Seez C, Summers S, Tapper A, Uchida K, Vazquez Acosta M, Virdee T, Wright J, Zenz SC, Cole JE, Hobson PR, Khan A, Kyberd P, Reid ID, Symonds P, Teodorescu L, Turner M, Borzou A, Call K, Dittmann J, Hatakeyama K, Liu H, Pastika N, Bartek R, Dominguez A, Buccilli A, Cooper SI, Henderson C, Rumerio P, West C, Arcaro D, Avetisyan A, Bose T, Gastler D, Rankin D, Richardson C, Rohlf J, Sulak L, Zou D, Benelli G, Cutts D, Garabedian A, Hakala J, Heintz U, Hogan JM, Jesus O, Kwok KHM, Laird E, Landsberg G, Mao Z, Narain M, Piperov S, Sagir S, Spencer E, Syarif R, Breedon R, Burns D, De La Barca Sanchez MC, Chauhan S, Chertok M, Conway J, Conway R, Cox PT, Erbacher R, Flores C, Funk G, Gardner M, Ko W, Lander R, Mclean C, Mulhearn M, Pellett D, Pilot J, Shalhout S, Shi M, Smith J, Squires M, Stolp D, Tos K, Tripathi M, Bachtis M, Bravo C, Cousins R, Dasgupta A, Florent A, Hauser J, Ignatenko M, Mccoll N, Saltzberg D, Schnaible C, Valuev V, Weber M, Bouvier E, Burt K, Clare R, Ellison J, Gary JW, Ghiasi Shirazi SMA, Hanson G, Heilman J, Jandir P, Kennedy E, Lacroix F, Long OR, Olmedo Negrete M, Paneva MI, Shrinivas A, Si W, Wei H, Wimpenny S, Yates BR, Branson JG, Cerati GB, Cittolin S, Derdzinski M, Gerosa R, Holzner A, Klein D, Krutelyov V, Letts J, Macneill I, Olivito D, Padhi S, Pieri M, Sani M, Sharma V, Simon S, Tadel M, Vartak A, Wasserbaech S, Welke C, Wood J, Würthwein F, Yagil A, Della Porta GZ, Amin N, Bhandari R, Bradmiller-Feld J, Campagnari C, Dishaw A, Dutta V, Franco Sevilla M, George C, Golf F, Gouskos L, Gran J, Heller R, Incandela J, Mullin SD, Ovcharova A, Qu H, Richman J, Stuart D, Suarez I, Yoo J, Anderson D, Bendavid J, Bornheim A, Bunn J, Duarte J, Lawhorn JM, Mott A, Newman HB, Pena C, Spiropulu M, Vlimant JR, Xie S, Zhu RY, Andrews MB, Ferguson T, Paulini M, Russ J, Sun M, Vogel H, Vorobiev I, Weinberg M, Cumalat JP, Ford WT, Jensen F, Johnson A, Krohn M, Leontsinis S, Mulholland T, Stenson K, Wagner SR, Alexander J, Chaves J, Chu J, Dittmer S, Mcdermott K, Mirman N, Kaufman GN, Patterson JR, Rinkevicius A, Ryd A, Skinnari L, Soffi L, Tan SM, Tao Z, Thom J, Tucker J, Wittich P, Zientek M, Winn D, Abdullin S, Albrow M, Apollinari G, Apresyan A, Banerjee S, Bauerdick LAT, Beretvas A, Berryhill J, Bhat PC, Bolla G, Burkett K, Butler JN, Cheung HWK, Chlebana F, Cihangir S, Cremonesi M, Elvira VD, Fisk I, Freeman J, Gottschalk E, Gray L, Green D, Grünendahl S, Gutsche O, Hare D, Harris RM, Hasegawa S, Hirschauer J, Hu Z, Jayatilaka B, Jindariani S, Johnson M, Joshi U, Klima B, Kreis B, Lammel S, Linacre J, Lincoln D, Lipton R, Liu M, Liu T, De Sá RL, Lykken J, Maeshima K, Magini N, Marraffino JM, Maruyama S, Mason D, McBride P, Merkel P, Mrenna S, Nahn S, O’Dell V, Pedro K, Prokofyev O, Rakness G, Ristori L, Sexton-Kennedy E, Soha A, Spalding WJ, Spiegel L, Stoynev S, Strait J, Strobbe N, Taylor L, Tkaczyk S, Tran NV, Uplegger L, Vaandering EW, Vernieri C, Verzocchi M, Vidal R, Wang M, Weber HA, Whitbeck A, Wu Y, Acosta D, Avery P, Bortignon P, Bourilkov D, Brinkerhoff A, Carnes A, Carver M, Curry D, Das S, Field RD, Furic IK, Konigsberg J, Korytov A, Low JF, Ma P, Matchev K, Mei H, Mitselmakher G, Rank D, Shchutska L, Sperka D, Thomas L, Wang J, Wang S, Yelton J, Linn S, Markowitz P, Martinez G, Rodriguez JL, Ackert A, Adams T, Askew A, Bein S, Hagopian S, Hagopian V, Johnson KF, Kolberg T, Perry T, Prosper H, Santra A, Yohay R, Baarmand MM, Bhopatkar V, Colafranceschi S, Hohlmann M, Noonan D, Roy T, Yumiceva F, Adams MR, Apanasevich L, Berry D, Betts RR, Bucinskaite I, Cavanaugh R, Chen X, Evdokimov O, Gauthier L, Gerber CE, Hofman DJ, Jung K, Sandoval Gonzalez ID, Varelas N, Wang H, Wu Z, Zakaria M, Zhang J, Bilki B, Clarida W, Dilsiz K, Durgut S, Gandrajula RP, Haytmyradov M, Khristenko V, Merlo JP, Mermerkaya H, Mestvirishvili A, Moeller A, Nachtman J, Ogul H, Onel Y, Ozok F, Penzo A, Snyder C, Tiras E, Wetzel J, Yi K, Blumenfeld B, Cocoros A, Eminizer N, Fehling D, Feng L, Gritsan AV, Maksimovic P, Roskes J, Sarica U, Swartz M, Xiao M, You C, Al-bataineh A, Baringer P, Bean A, Boren S, Bowen J, Castle J, Forthomme L, Kenny RP, Khalil S, Kropivnitskaya A, Majumder D, Mcbrayer W, Murray M, Sanders S, Stringer R, Tapia Takaki JD, Wang Q, Ivanov A, Kaadze K, Maravin Y, Mohammadi A, Saini LK, Skhirtladze N, Toda S, Rebassoo F, Wright D, Anelli C, Baden A, Baron O, Belloni A, Calvert B, Eno SC, Ferraioli C, Gomez JA, Hadley NJ, Jabeen S, Jeng GY, Kellogg RG, Kunkle J, Mignerey AC, Ricci-Tam F, Shin YH, Skuja A, Tonjes MB, Tonwar SC, Abercrombie D, Allen B, Apyan A, Azzolini V, Barbieri R, Baty A, Bi R, Bierwagen K, Brandt S, Busza W, Cali IA, D’Alfonso M, Demiragli Z, Gomez Ceballos G, Goncharov M, Hsu D, Iiyama Y, Innocenti GM, Klute M, Kovalskyi D, Krajczar K, Lai YS, Lee YJ, Levin A, Luckey PD, Maier B, Marini AC, Mcginn C, Mironov C, Narayanan S, Niu X, Paus C, Roland C, Roland G, Salfeld-Nebgen J, Stephans GSF, Tatar K, Velicanu D, Wang J, Wang TW, Wyslouch B, Benvenuti AC, Chatterjee RM, Evans A, Hansen P, Kalafut S, Kao SC, Kubota Y, Lesko Z, Mans J, Nourbakhsh S, Ruckstuhl N, Rusack R, Tambe N, Turkewitz J, Acosta JG, Oliveros S, Avdeeva E, Bloom K, Claes DR, Fangmeier C, Gonzalez Suarez R, Kamalieddin R, Kravchenko I, Malta Rodrigues A, Monroy J, Siado JE, Snow GR, Stieger B, Alyari M, Dolen J, Godshalk A, Harrington C, Iashvili I, Kaisen J, Nguyen D, Parker A, Rappoccio S, Roozbahani B, Alverson G, Barberis E, Hortiangtham A, Massironi A, Morse DM, Nash D, Orimoto T, De Lima RT, Trocino D, Wang RJ, Wood D, Bhattacharya S, Charaf O, Hahn KA, Kumar A, Mucia N, Odell N, Pollack B, Schmitt MH, Sung K, Trovato M, Velasco M, Dev N, Hildreth M, Hurtado Anampa K, Jessop C, Karmgard DJ, Kellams N, Lannon K, Marinelli N, Meng F, Mueller C, Musienko Y, Planer M, Reinsvold A, Ruchti R, Rupprecht N, Smith G, Taroni S, Wayne M, Wolf M, Woodard A, Alimena J, Antonelli L, Bylsma B, Durkin LS, Flowers S, Francis B, Hart A, Hill C, Ji W, Liu B, Luo W, Puigh D, Winer BL, Wulsin HW, Cooperstein S, Driga O, Elmer P, Hardenbrook J, Hebda P, Lange D, Luo J, Marlow D, Medvedeva T, Mei K, Ojalvo I, Olsen J, Palmer C, Piroué P, Stickland D, Svyatkovskiy A, Tully C, Malik S, Barker A, Barnes VE, Folgueras S, Gutay L, Jha MK, Jones M, Jung AW, Khatiwada A, Miller DH, Neumeister N, Schulte JF, Shi X, Sun J, Wang F, Xie W, Parashar N, Stupak J, Adair A, Akgun B, Chen Z, Ecklund KM, Geurts FJM, Guilbaud M, Li W, Michlin B, Northup M, Padley BP, Roberts J, Rorie J, Tu Z, Zabel J, Betchart B, Bodek A, de Barbaro P, Demina R, Duh YT, Ferbel T, Galanti M, Garcia-Bellido A, Han J, Hindrichs O, Khukhunaishvili A, Lo KH, Tan P, Verzetti M, Ciesielski R, Agapitos A, Chou JP, Gershtein Y, Gómez Espinosa TA, Halkiadakis E, Heindl M, Hughes E, Kaplan S, Kunnawalkam Elayavalli R, Kyriacou S, Lath A, Nash K, Osherson M, Saka H, Salur S, Schnetzer S, Sheffield D, Somalwar S, Stone R, Thomas S, Thomassen P, Walker M, Delannoy AG, Foerster M, Heideman J, Riley G, Rose K, Spanier S, Thapa K, Bouhali O, Celik A, Dalchenko M, De Mattia M, Delgado A, Dildick S, Eusebi R, Gilmore J, Huang T, Juska E, Kamon T, Mueller R, Pakhotin Y, Patel R, Perloff A, Perniè L, Rathjens D, Safonov A, Tatarinov A, Ulmer KA, Akchurin N, Damgov J, De Guio F, Dragoiu C, Dudero PR, Faulkner J, Gurpinar E, Kunori S, Lamichhane K, Lee SW, Libeiro T, Peltola T, Undleeb S, Volobouev I, Wang Z, Greene S, Gurrola A, Janjam R, Johns W, Maguire C, Melo A, Ni H, Sheldon P, Tuo S, Velkovska J, Xu Q, Arenton MW, Barria P, Cox B, Goodell J, Hirosky R, Ledovskoy A, Li H, Neu C, Sinthuprasith T, Sun X, Wang Y, Wolfe E, Xia F, Clarke C, Harr R, Karchin PE, Sturdy J, Zaleski S, Belknap DA, Buchanan J, Caillol C, Dasu S, Dodd L, Duric S, Gomber B, Grothe M, Herndon M, Hervé A, Klabbers P, Lanaro A, Levine A, Long K, Loveless R, Pierro GA, Polese G, Ruggles T, Savin A, Smith N, Smith WH, Taylor D, Woods N. Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at s = 7 TeV

Events with no charged particles produced between the two leading jets are studied in proton-proton collisions ats = 7 TeV . The jets were required to have transverse momentump T jet > 40 GeV and pseudorapidity1.5 < | η jet | < 4.7 , and to have values of η jet with opposite signs. The data used for this study were collected with the CMS detector during low-luminosity running at the LHC, and correspond to an integrated luminosity of 8pb - 1 . Events with no charged particles withp T > 0.2 GeV in the interval - 1 < η < 1 between the jets are observed in excess of calculations that assume no color-singlet exchange. The fraction of events with such a rapidity gap, amounting to 0.5-1% of the selected dijet sample, is measured as a function of the p T of the second-leading jet and of the rapidity separation between the jets. The data are compared to previous measurements at the Tevatron, and to perturbative quantum chromodynamics calculations based on the Balitsky-Fadin-Kuraev-Lipatov evolution equations, including different models of the non-perturbative gap survival probability.

A deep ocean acoustic noise floor, 1-800 Hz

The ocean acoustic noise floor (observed when the overhead wind is low, ships are distant, and marine life silent) has been measured on an array extending up 987 m from 5048 m depth in the eastern North Pacific, in what is one of only a few recent measurements of the vertical noise distribution near the seafloor in the deep ocean. The floor is roughly independent of depth for 1-6 Hz, and the slope (∼ f^-7) is consistent with Longuet-Higgins radiation from oppositely-directed surface waves. Above 6 Hz, the acoustic floor increases with frequency due to distant shipping before falling as ∼ f^-2 from 40 to 800 Hz. The noise floor just above the seafloor is only about 5 dB greater than during the 1975 CHURCH OPAL experiment (50-200 Hz), even though these measurements are not subject to the same bathymetric blockage. The floor increases up the array by roughly 15 dB for 40-500 Hz. Immediately above the seafloor, the acoustic energy is concentrated in a narrow, horizontal beam that narrows as f^-1 and has a beam width at 75 Hz that is less than the array resolution. The power in the beam falls more steeply with frequency than the omnidirectional spectrum.

Quantitative Assessment of HER-2/Neu Protein Concentration in Breast Cancer by Enzyme-Linked Immunosorbent Assay

Purpose

The HER-2/neu protein (p185) has become a promising target for antibody therapy in breast cancer. We tested the feasibility of a quantitative approach for HER-2/neu testing based on the analysis of tumor tissue extracts by an enzyme-linked immunosorbent assay (ELISA).

Experimental design

Tumor tissue extracts of primary human breast cancers (n=124) were prepared using a triton-based buffer. HER-2/neu concentration was quantified by ELISA. Paraffin-embedded tissue sections of the same tumors were analyzed by immunohistochemical staining applying the monoclonal HER-2/neu antibody TAB 250 (n=124) and by chromogenic in situ hybridization (CISH) (n=73).

Results

Concentrations of p185 in tissue extracts determined by ELISA varied from 1 to 927 ng per mg protein with a median of 25 ng/mg protein, whereas normal breast tissue showed values from 0.4 to 5.5 ng/mg with a median of 2.2 ng/mg (p<0.0001, Mann-Whitney U test). A significant correlation between p185 concentration and immunohistochemical staining was observed (p<0.0001, Kruskal-Wallis test). In addition, p185 concentration measured by ELISA was correlated with the degree of HER-2/neu gene amplification determined by CISH. HER-2/neu-amplified tumors had significantly higher p185 concentrations (median value 181 ng/mg protein) than non-amplified tumors (median value 20 ng/mg; p<0.0001, Mann-Whitney U test).

Conclusions

ELISA-based measurement of HER-2/neu protein concentration in breast cancer tissue extracts is feasible and provides quantitative results for p185 protein concentrations that correlate closely with HER-2/neu immunoscore and gene amplification.

Search for dark matter produced in association with heavy-flavor quark pairs in proton-proton collisions at s = 13 TeV

A search is presented for an excess of events with heavy-flavor quark pairs ( t t ¯ and b b ¯ ) and a large imbalance in transverse momentum in data from proton-proton collisions at a center-of-mass energy of 13TeV . The data correspond to an integrated luminosity of 2.2fb - 1 collected with the CMS detector at the CERN LHC. No deviations are observed with respect to standard model predictions. The results are used in the first interpretation of dark matter production in t t ¯ and b b ¯ final states in a simplified model. This analysis is also the first to perform a statistical combination of searches for dark matter produced with different heavy-flavor final states. The combination provides exclusions that are stronger than those achieved with individual heavy-flavor final states.

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Maity M, Majumder G, Mazumdar K, Mitra S, Mohanty GB, Parida B, Sarkar T, Sur N, Sutar B, Wickramage N. Measurements of the associated production of a Z boson and b jets in pp collisions at s = 8 TeV

Measurements of the associated production of a Z boson with at least one jet originating from a b quark in proton-proton collisions ats = 8 TeV are presented. Differential cross sections are measured with data collected by the CMS experiment corresponding to an integrated luminosity of 19.8fb - 1 . Z bosons are reconstructed through their decays to electrons and muons. Cross sections are measured as a function of observables characterizing the kinematics of the b jet and the Z boson. Ratios of differential cross sections for the associated production with at least one b jet to the associated production with any jet are also presented. The production of a Z boson with at least two b jets is investigated, and differential cross sections are measured for the dijet system. Results are compared to theoretical predictions, testing two different flavour schemes for the choice of initial-state partons.

Measurement of the triple-differential dijet cross section in proton-proton collisions at s = 8 TeV and constraints on parton distribution functions

A measurement is presented of the triple-differential dijet cross section at a centre-of-mass energy of 8TeV using 19.7fb -1 of data collected with the CMS detector in proton-proton collisions at the LHC. The cross section is measured as a function of the average transverse momentum, half the rapidity separation, and the boost of the two leading jets in the event. The cross section is corrected for detector effects and compared to calculations in perturbative quantum chromodynamics at next-to-leading order accuracy, complemented with electroweak and nonperturbative corrections. New constraints on parton distribution functions are obtained and the inferred value of the strong coupling constant isα S ( M Z ) = 0.1199 ± 0.0015 ( exp ) - 0.0020 + 0.0031 ( theo ) , where M Z is the mass of the Z boson.

Interaction Between 2 Nutraceutical Treatments and Host Immune Status in the Pediatric Critical Illness Stress-Induced Immune Suppression Comparative Effectiveness Trial

BACKGROUND AND AIMS

The pediatric Critical Illness Stress-induced Immune Suppression (CRISIS) trial compared the effectiveness of 2 nutraceutical supplementation strategies and found no difference in the development of nosocomial infection and sepsis in the overall population. We performed an exploratory post hoc analysis of interaction between nutraceutical treatments and host immune status related to the development of nosocomial infection/sepsis.

METHODS

Children from the CRISIS trial were analyzed according to 3 admission immune status categories marked by decreasing immune competence: immune competent without lymphopenia, immune competent with lymphopenia, and previously immunocompromised. The comparative effectiveness of the 2 treatments was analyzed for interaction with immune status category.

RESULTS

There were 134 immune-competent children without lymphopenia, 79 previously immune-competent children with lymphopenia, and 27 immunocompromised children who received 1 of the 2 treatments. A significant interaction was found between treatment arms and immune status on the time to development of nosocomial infection and sepsis ( P < .05) and on the rate of nosocomial infection and sepsis per 100 patient days ( P < .05). Whey protein treatment protected immune-competent patients without lymphopenia from infection and sepsis, both nutraceutical strategies were equivalent in immune-competent patients with lymphopenia, and zinc, selenium, glutamine, and metoclopramide treatment protected immunocompromised patients from infection and sepsis.

CONCLUSIONS

The science of immune nutrition is more complex than previously thought. Future trial design should consider immune status at the time of trial entry because differential effects of nutraceuticals may be related to this patient characteristic.

Measurement of the B^{±} Meson Nuclear Modification Factor in Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV

The differential production cross sections of B^{±} mesons are measured via the exclusive decay channels B^{±}→J/ψK^{±}→μ^{+}μ^{-}K^{±} as a function of transverse momentum in pp and Pb-Pb collisions at a center-of-mass energy sqrt[s_{NN}]=5.02  TeV per nucleon pair with the CMS detector at the LHC. The pp(Pb-Pb) data set used for this analysis corresponds to an integrated luminosity of 28.0  pb^{-1} (351  μb^{-1}). The measurement is performed in the B^{±} meson transverse momentum range of 7 to 50  GeV/c, in the rapidity interval |y|<2.4. In this kinematic range, a strong suppression of the production cross section by about a factor of 2 is observed in the Pb-Pb system in comparison to the expectation from pp reference data. These results are found to be roughly compatible with theoretical calculations incorporating beauty quark diffusion and energy loss in a quark-gluon plasma.

Search for Charged Higgs Bosons Produced via Vector Boson Fusion and Decaying into a Pair of W and Z Bosons Using pp Collisions at sqrt[s]=13 TeV

A search for charged Higgs bosons produced via vector boson fusion and decaying into W and Z bosons using proton-proton collisions at sqrt[s]=13  TeV is presented. The data sample corresponds to an integrated luminosity of 15.2  fb^{-1} collected with the CMS detector in 2015 and 2016. The event selection requires three leptons (electrons or muons), two jets with large pseudorapidity separation and high dijet mass, and missing transverse momentum. The observation agrees with the standard model prediction. Limits on the vector boson fusion production cross section times branching fraction for new charged physical states are reported as a function of mass from 200 to 2000 GeV and interpreted in the context of Higgs triplet models.

Factors Associated with Bleeding and Thrombosis in Children Receiving Extracorporeal Membrane Oxygenation

RATIONALE

Extracorporeal membrane oxygenation (ECMO) is used for respiratory and cardiac failure in children but is complicated by bleeding and thrombosis.

OBJECTIVES

(1) To measure the incidence of bleeding (blood loss requiring transfusion or intracranial hemorrhage) and thrombosis during ECMO support; (2) to identify factors associated with these complications; and (3) to determine the impact of these complications on patient outcome.

METHODS

This was a prospective, observational cohort study in pediatric, cardiac, and neonatal intensive care units in eight hospitals, carried out from December 2012 to September 2014.

MEASUREMENTS AND MAIN RESULTS

ECMO was used on 514 consecutive patients under age 19 years. Demographics, anticoagulation practices, severity of illness, circuitry components, bleeding, thrombotic events, and outcome were recorded. Survival was 54.9%. Bleeding occurred in 70.2%, including intracranial hemorrhage in 16%, and was independently associated with higher daily risk of mortality. Circuit component changes were required in 31.1%, and patient-related clots occurred in 12.8%. Laboratory sampling contributed to transfusion requirement in 56.6%, and was the sole reason for at least one transfusion in 42.2% of patients. Pump type was not associated with bleeding, thrombosis, hemolysis, or mortality. Hemolysis was predictive of subsequent thrombotic events. Neither hemolysis nor thrombotic events increased the risk of mortality.

CONCLUSIONS

The incidences of bleeding and thrombosis are high during ECMO support. Laboratory sampling is a major contributor to transfusion during ECMO. Strategies to reduce the daily risk of bleeding and thrombosis, and different thresholds for transfusion, may be appropriate subjects of future trials to improve outcomes of children requiring this supportive therapy.

Study of Jet Quenching with Z+jet Correlations in Pb-Pb and pp Collisions at sqrt[s]_{NN}=5.02 TeV

The production of jets in association with Z bosons, reconstructed via the μ^{+}μ^{-} and e^{+}e^{-} decay channels, is studied in pp and, for the first time, in Pb-Pb collisions. Both data samples were collected by the CMS experiment at the LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The Pb-Pb collisions were analyzed in the 0%-30% centrality range. The back-to-back azimuthal alignment was studied in both pp and Pb-Pb collisions for Z bosons with transverse momentum p_{T}^{Z}>60  GeV/c and a recoiling jet with p_{T}^{jet}>30  GeV/c. The p_{T} imbalance x_{jZ}=p_{T}^{jet}/p_{T}^{Z}, as well as the average number of jet partners per Z, R_{jZ}, was studied in intervals of p_{T}^{Z}. The R_{jZ} is found to be smaller in Pb-Pb than in pp collisions, which suggests that in Pb-Pb collisions a larger fraction of partons associated with the Z bosons fall below the 30  GeV/c p_{T}^{jet} threshold because they lose energy.

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Measurement of the jet mass in highly boosted [Formula: see text] events from pp collisions at [Formula: see text][Formula: see text]

The first measurement of the jet mass [Formula: see text] of top quark jets produced in [Formula: see text] events from pp collisions at [Formula: see text] [Formula: see text] is reported for the jet with the largest transverse momentum [Formula: see text] in highly boosted hadronic top quark decays. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.7[Formula: see text]. The measurement is performed in the lepton+jets channel in which the products of the semileptonic decay [Formula: see text] with [Formula: see text] where [Formula: see text] is an electron or muon, are used to select [Formula: see text] events with large Lorentz boosts. The products of the fully hadronic decay [Formula: see text] with [Formula: see text] are reconstructed using a single Cambridge-Aachen jet with distance parameter [Formula: see text], and [Formula: see text] [Formula: see text]. The [Formula: see text] cross section as a function of [Formula: see text] is unfolded at the particle level and is used to test the modelling of highly boosted top quark production. The peak position of the [Formula: see text] distribution is sensitive to the top quark mass [Formula: see text], and the data are used to extract a value of [Formula: see text] to assess this sensitivity.

Measurement of double-differential cross sections for top quark pair production in pp collisions at [Formula: see text][Formula: see text] and impact on parton distribution functions

Normalized double-differential cross sections for top quark pair ([Formula: see text]) production are measured in pp collisions at a centre-of-mass energy of 8[Formula: see text] with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7[Formula: see text]. The measurement is performed in the dilepton [Formula: see text] final state. The [Formula: see text] cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and [Formula: see text] system. The data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. They are also compared to predictions of Monte Carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. Overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. The inclusion of the measured [Formula: see text] cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution.