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Abbott BP, Abbott R, Abbott TD, Abernathy MR, Acernese F, Ackley K, Adams C, Adams T, Addesso P, Adhikari RX, Adya VB, Affeldt C, Agathos M, Agatsuma K, Aggarwal N, Aguiar OD, Aiello L, Ain A, Ajith P, Allen B, Allocca A, Altin PA, Ananyeva A, Anderson SB, Anderson WG, Appert S, Arai K, Araya MC, Areeda JS, Arnaud N, Arun KG, Ascenzi S, Ashton G, Ast M, Aston SM, Astone P, Aufmuth P, Aulbert C, Avila-Alvarez A, Babak S, Bacon P, Bader MKM, Baker PT, Baldaccini F, Ballardin G, Ballmer SW, Barayoga JC, Barclay SE, Barish BC, Barker D, Barone F, Barr B, Barsotti L, Barsuglia M, Barta D, Bartlett J, Bartos I, Bassiri R, Basti A, Batch JC, Baune C, Bavigadda V, Bazzan M, Beer C, Bejger M, Belahcene I, Belgin M, Bell AS, Berger BK, Bergmann G, Berry CPL, Bersanetti D, Bertolini A, Betzwieser J, Bhagwat S, Bhandare R, Bilenko IA, Billingsley G, Billman CR, Birch J, Birney R, Birnholtz O, Biscans S, Biscoveanu AS, Bisht A, Bitossi M, Biwer C, Bizouard MA, Blackburn JK, Blackman J, Blair CD, Blair DG, Blair RM, Bloemen S, Bock O, Boer M, Bogaert G, Bohe A, Bondu F, Bonnand R, Boom BA, Bork R, Boschi V, Bose S, Bouffanais Y, Bozzi A, Bradaschia C, Brady PR, Braginsky VB, Branchesi M, Brau JE, Briant T, Brillet A, Brinkmann M, Brisson V, Brockill P, Broida JE, Brooks AF, Brown DA, Brown DD, Brown NM, Brunett S, Buchanan CC, Buikema A, Bulik T, Bulten HJ, Buonanno A, Buskulic D, Buy C, Byer RL, Cabero M, Cadonati L, Cagnoli G, Cahillane C, Calderón Bustillo J, Callister TA, Calloni E, Camp JB, Campbell W, Canepa M, Cannon KC, Cao H, Cao J, Capano CD, Capocasa E, Carbognani F, Caride S, Casanueva Diaz J, Casentini C, Caudill S, Cavaglià M, Cavalier F, Cavalieri R, Cella G, Cepeda CB, Cerboni Baiardi L, Cerretani G, Cesarini E, Chamberlin SJ, Chan M, Chao S, Charlton P, Chassande-Mottin E, Cheeseboro BD, Chen HY, Chen Y, Cheng HP, Chincarini A, Chiummo A, Chmiel T, Cho HS, Cho M, Chow JH, Christensen N, Chu Q, Chua AJK, Chua S, Chung S, Ciani G, Clara F, Clark JA, Cleva F, Cocchieri C, Coccia E, Cohadon PF, Colla A, Collette CG, Cominsky L, Constancio M, Conti L, Cooper SJ, Corbitt TR, Cornish N, Corsi A, Cortese S, Costa CA, Coughlin E, 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, Crowder SG, Cullen TJ, Cumming A, Cunningham L, Cuoco E, Dal Canton T, Danilishin SL, D'Antonio S, Danzmann K, Dasgupta A, Da Silva Costa CF, Dattilo V, Dave I, Davier M, Davies GS, Davis D, Daw EJ, Day B, Day R, De S, DeBra D, Debreczeni G, Degallaix J, De Laurentis M, Deléglise S, Del Pozzo W, Denker T, Dent T, Dergachev V, De Rosa R, DeRosa RT, DeSalvo R, Devenson J, Devine RC, Dhurandhar S, Díaz MC, Di Fiore L, Di Giovanni M, Di Girolamo T, Di Lieto A, Di Pace S, Di Palma I, Di Virgilio A, Doctor Z, Dolique V, Donovan F, Dooley KL, Doravari S, Dorrington I, Douglas R, Dovale Álvarez M, Downes TP, Drago M, Drever RWP, Driggers JC, Du Z, Ducrot M, Dwyer SE, Edo TB, Edwards MC, Effler A, Eggenstein HB, Ehrens P, Eichholz J, Eikenberry SS, Essick RC, Etienne Z, Etzel T, Evans M, Evans TM, Everett R, Factourovich M, Fafone V, Fair H, Fairhurst S, Fan X, Farinon S, Farr B, Farr WM, Fauchon-Jones EJ, Favata M, Fays M, Fehrmann H, Fejer MM, Fernández Galiana A, Ferrante I, Ferreira EC, Ferrini F, Fidecaro F, Fiori I, Fiorucci D, Fisher RP, Flaminio R, Fletcher M, Fong H, Forsyth SS, Fournier JD, Frasca S, Frasconi F, Frei Z, Freise A, Frey R, Frey V, Fries EM, Fritschel P, Frolov VV, Fulda P, Fyffe M, Gabbard H, Gadre BU, Gaebel SM, Gair JR, Gammaitoni L, Gaonkar SG, Garufi F, Gaur G, Gayathri V, Gehrels N, Gemme G, Genin E, Gennai A, George J, Gergely L, Germain V, Ghonge S, Ghosh A, Ghosh A, Ghosh S, Giaime JA, Giardina KD, Giazotto A, Gill K, Glaefke A, Goetz E, Goetz R, Gondan L, González G, Gonzalez Castro JM, Gopakumar A, Gorodetsky ML, Gossan SE, Gosselin M, Gouaty R, Grado A, Graef C, Granata M, Grant A, Gras S, Gray C, Greco G, Green AC, Groot P, Grote H, Grunewald S, Guidi GM, Guo X, Gupta A, Gupta MK, Gushwa KE, Gustafson EK, Gustafson R, Hacker JJ, Hall BR, Hall ED, Hammond G, Haney M, Hanke MM, Hanks J, Hanna C, Hannam MD, Hanson J, Hardwick T, Harms J, Harry GM, Harry IW, Hart MJ, Hartman MT, Haster CJ, Haughian K, Healy J, Heidmann A, Heintze MC, Heitmann H, Hello P, Hemming G, Hendry M, Heng IS, Hennig J, Henry J, Heptonstall AW, Heurs M, Hild S, Hoak D, Hofman D, Holt K, Holz DE, Hopkins P, Hough J, Houston EA, Howell EJ, Hu YM, Huerta EA, Huet D, Hughey B, Husa S, Huttner SH, Huynh-Dinh T, Indik N, Ingram DR, Inta R, Isa HN, Isac JM, Isi M, Isogai T, Iyer BR, Izumi K, Jacqmin T, Jani K, Jaranowski P, Jawahar S, Jiménez-Forteza F, Johnson WW, Jones DI, Jones R, Jonker RJG, Ju L, Junker J, Kalaghatgi CV, Kalogera V, Kandhasamy S, Kang G, Kanner JB, Karki S, Karvinen KS, Kasprzack M, Katsavounidis E, Katzman W, Kaufer S, Kaur T, Kawabe K, Kéfélian F, Keitel D, Kelley DB, Kennedy R, Key JS, Khalili FY, Khan I, Khan S, Khan Z, Khazanov EA, Kijbunchoo N, Kim C, Kim JC, Kim W, Kim W, Kim YM, Kimbrell SJ, King EJ, King PJ, Kirchhoff R, Kissel JS, Klein B, Kleybolte L, Klimenko S, Koch P, Koehlenbeck SM, Koley S, Kondrashov V, Kontos A, Korobko M, Korth WZ, Kowalska I, Kozak DB, Krämer C, Kringel V, Królak A, Kuehn G, Kumar P, Kumar R, Kuo L, Kutynia A, Lackey BD, Landry M, Lang RN, Lange J, Lantz B, Lanza RK, Lartaux-Vollard A, Lasky PD, Laxen M, Lazzarini A, Lazzaro C, Leaci P, Leavey S, Lebigot EO, Lee CH, Lee HK, Lee HM, Lee K, Lehmann J, Lenon A, Leonardi M, Leong JR, Leroy N, Letendre N, Levin Y, Li TGF, Libson A, Littenberg TB, Liu J, Lockerbie NA, Lombardi AL, London LT, Lord JE, Lorenzini M, Loriette V, Lormand M, Losurdo G, Lough JD, Lousto CO, Lovelace G, Lück H, Lundgren AP, Lynch R, Ma Y, Macfoy S, Machenschalk B, MacInnis M, Macleod DM, Magaña-Sandoval F, Majorana E, Maksimovic I, Malvezzi V, Man N, Mandic V, Mangano V, Mansell GL, Manske M, Mantovani M, Marchesoni F, Marion F, Márka S, Márka Z, Markosyan AS, Maros E, Martelli F, Martellini L, Martin IW, Martynov DV, Mason K, Masserot A, Massinger TJ, Masso-Reid M, Mastrogiovanni S, Matas A, Matichard F, Matone L, Mavalvala N, Mazumder N, McCarthy R, McClelland DE, McCormick S, McGrath C, McGuire SC, McIntyre G, McIver J, McManus DJ, McRae T, McWilliams ST, Meacher D, Meadors GD, Meidam J, Melatos A, Mendell G, Mendoza-Gandara D, Mercer RA, Merilh EL, Merzougui M, Meshkov S, Messenger C, Messick C, Metzdorff R, Meyers PM, Mezzani F, Miao H, Michel C, Middleton H, Mikhailov EE, Milano L, Miller AL, Miller A, Miller BB, Miller J, Millhouse M, Minenkov Y, Ming J, Mirshekari S, Mishra C, Mitra S, Mitrofanov VP, Mitselmakher G, Mittleman R, Moggi A, Mohan M, Mohapatra SRP, Montani M, Moore BC, Moore CJ, Moraru D, Moreno G, Morriss SR, Mours B, Mow-Lowry CM, Mueller G, Muir AW, Mukherjee A, Mukherjee D, Mukherjee S, Mukund N, Mullavey A, Munch J, Muniz EAM, Murray PG, Mytidis A, Napier K, Nardecchia I, Naticchioni L, Nelemans G, Nelson TJN, Neri M, Nery M, Neunzert A, Newport JM, Newton G, Nguyen TT, Nielsen AB, Nissanke S, Nitz A, Noack A, Nocera F, Nolting D, Normandin MEN, Nuttall LK, Oberling J, Ochsner E, Oelker E, Ogin GH, Oh JJ, Oh SH, Ohme F, Oliver M, Oppermann P, Oram RJ, O'Reilly B, O'Shaughnessy R, Ottaway DJ, Overmier H, Owen BJ, Pace AE, Page J, Pai A, Pai SA, Palamos JR, Palashov O, Palomba C, Pal-Singh A, Pan H, Pankow C, Pannarale F, Pant BC, Paoletti F, Paoli A, Papa MA, Paris HR, Parker W, Pascucci D, Pasqualetti A, Passaquieti R, Passuello D, Patricelli B, Pearlstone BL, Pedraza M, Pedurand R, Pekowsky L, Pele A, Penn S, Perez CJ, Perreca A, Perri LM, Pfeiffer HP, Phelps M, Piccinni OJ, Pichot M, Piergiovanni F, Pierro V, Pillant G, Pinard L, Pinto IM, Pitkin M, Poe M, Poggiani R, Popolizio P, Post A, Powell J, Prasad J, Pratt JWW, Predoi V, Prestegard T, Prijatelj M, Principe M, Privitera S, Prodi GA, Prokhorov LG, Puncken O, Punturo M, Puppo P, Pürrer M, Qi H, Qin J, Qiu S, Quetschke V, Quintero EA, Quitzow-James R, Raab FJ, Rabeling DS, Radkins H, Raffai P, Raja S, Rajan C, Rakhmanov M, Rapagnani P, Raymond V, Razzano M, Re V, Read J, Regimbau T, Rei L, Reid S, Reitze DH, Rew H, Reyes SD, Rhoades E, Ricci F, Riles K, Rizzo M, Robertson NA, Robie R, Robinet F, Rocchi A, Rolland L, Rollins JG, Roma VJ, Romano JD, Romano R, Romie JH, Rosińska D, Rowan S, Rüdiger A, Ruggi P, Ryan K, Sachdev S, Sadecki T, Sadeghian L, Sakellariadou M, Salconi L, Saleem M, Salemi F, Samajdar A, Sammut L, Sampson LM, Sanchez EJ, Sandberg V, Sanders JR, Sassolas B, Sathyaprakash BS, Saulson PR, Sauter O, Savage RL, Sawadsky A, Schale P, Scheuer J, Schlassa S, Schmidt E, Schmidt J, Schmidt P, Schnabel R, Schofield RMS, Schönbeck A, Schreiber E, Schuette D, Schutz BF, Schwalbe SG, Scott J, Scott SM, Sellers D, Sengupta AS, Sentenac D, Sequino V, Sergeev A, Setyawati Y, Shaddock DA, Shaffer TJ, Shahriar MS, Shapiro B, Shawhan P, Sheperd A, Shoemaker DH, Shoemaker DM, Siellez K, Siemens X, Sieniawska M, Sigg D, Silva AD, Singer A, Singer LP, Singh A, Singh R, Singhal A, Sintes AM, Slagmolen BJJ, Smith B, Smith JR, Smith RJE, Son EJ, Sorazu B, Sorrentino F, Souradeep T, Spencer AP, Srivastava AK, Staley A, Steinke M, Steinlechner J, Steinlechner S, Steinmeyer D, Stephens BC, Stevenson SP, Stone R, Strain KA, Straniero N, Stratta G, Strigin SE, Sturani R, Stuver AL, Summerscales TZ, Sun L, Sunil S, Sutton PJ, Swinkels BL, Szczepańczyk MJ, Tacca M, Talukder D, Tanner DB, Tao D, Tápai M, Taracchini A, Taylor R, Theeg T, Thomas EG, Thomas M, Thomas P, Thorne KA, Thrane E, Tippens T, Tiwari S, Tiwari V, Tokmakov KV, Toland K, Tomlinson C, Tonelli M, Tornasi Z, Torrie CI, Töyrä D, Travasso F, Traylor G, Trifirò D, Trinastic J, Tringali MC, Trozzo L, Tse M, Tso R, Turconi M, Tuyenbayev D, Ugolini D, Unnikrishnan CS, Urban AL, Usman SA, Vahlbruch H, Vajente G, Valdes G, van Bakel N, van Beuzekom M, van den Brand JFJ, Van Den Broeck C, Vander-Hyde DC, van der Schaaf L, van Heijningen JV, van Veggel AA, Vardaro M, Varma V, Vass S, Vasúth M, Vecchio A, Vedovato G, Veitch J, Veitch PJ, Venkateswara K, Venugopalan G, Verkindt D, Vetrano F, Viceré A, Viets AD, Vinciguerra S, Vine DJ, Vinet JY, Vitale S, Vo T, Vocca H, Vorvick C, Voss DV, Vousden WD, Vyatchanin SP, Wade AR, Wade LE, Wade M, Walker M, Wallace L, Walsh S, Wang G, Wang H, Wang M, Wang Y, Ward RL, Warner J, Was M, Watchi J, Weaver B, Wei LW, Weinert M, Weinstein AJ, Weiss R, Wen L, Weßels P, Westphal T, Wette K, Whelan JT, Whiting BF, Whittle C, Williams D, Williams RD, Williamson AR, Willis JL, Willke B, Wimmer MH, Winkler W, Wipf CC, Wittel H, Woan G, Woehler J, Worden J, Wright JL, Wu DS, Wu G, Yam W, Yamamoto H, Yancey CC, Yap MJ, Yu H, Yu H, Yvert M, Zadrożny A, Zangrando L, Zanolin M, Zendri JP, Zevin M, Zhang L, Zhang M, Zhang T, Zhang Y, Zhao C, Zhou M, Zhou Z, Zhu SJ, Zhu XJ, Zucker ME, Zweizig J. Directional Limits on Persistent Gravitational Waves from Advanced LIGO's First Observing Run. PHYSICAL REVIEW LETTERS 2017; 118:121102. [PMID: 28388200 DOI: 10.1103/physrevlett.118.121102] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Indexed: 06/07/2023]
Abstract
We employ gravitational-wave radiometry to map the stochastic gravitational wave background expected from a variety of contributing mechanisms and test the assumption of isotropy using data from the Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run. We also search for persistent gravitational waves from point sources with only minimal assumptions over the 20-1726 Hz frequency band. Finding no evidence of gravitational waves from either point sources or a stochastic background, we set limits at 90% confidence. For broadband point sources, we report upper limits on the gravitational wave energy flux per unit frequency in the range F_{α,Θ}(f)<(0.1-56)×10^{-8} erg cm^{-2} s^{-1} Hz^{-1}(f/25 Hz)^{α-1} depending on the sky location Θ and the spectral power index α. For extended sources, we report upper limits on the fractional gravitational wave energy density required to close the Universe of Ω(f,Θ)<(0.39-7.6)×10^{-8} sr^{-1}(f/25 Hz)^{α} depending on Θ and α. Directed searches for narrowband gravitational waves from astrophysically interesting objects (Scorpius X-1, Supernova 1987 A, and the Galactic Center) yield median frequency-dependent limits on strain amplitude of h_{0}<(6.7,5.5, and 7.0)×10^{-25}, respectively, at the most sensitive detector frequencies between 130-175 Hz. This represents a mean improvement of a factor of 2 across the band compared to previous searches of this kind for these sky locations, considering the different quantities of strain constrained in each case.
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Abbott BP, Abbott R, Abbott TD, Abernathy MR, Acernese F, Ackley K, Adams C, Adams T, Addesso P, Adhikari RX, Adya VB, Affeldt C, Agathos M, Agatsuma K, Aggarwal N, Aguiar OD, Aiello L, Ain A, Ajith P, Allen B, Allocca A, Altin PA, Anderson SB, Anderson WG, Arai K, Araya MC, Arceneaux CC, Areeda JS, Arnaud N, Arun KG, Ascenzi S, Ashton G, Ast M, Aston SM, Astone P, Aufmuth P, Aulbert C, Babak S, Bacon P, Bader MKM, Baker PT, Baldaccini F, Ballardin G, Ballmer SW, Barayoga JC, Barclay SE, Barish BC, Barker D, Barone F, Barr B, Barsotti L, Barsuglia M, Barta D, Bartlett J, Bartos I, Bassiri R, Basti A, Batch JC, Baune C, Bavigadda V, Bazzan M, Bejger M, Bell AS, Berger BK, Bergmann G, Berry CPL, Bersanetti D, Bertolini A, Betzwieser J, Bhagwat S, Bhandare R, Bilenko IA, Billingsley G, Birch J, Birney R, Birnholtz O, Biscans S, Bisht A, Bitossi M, Biwer C, Bizouard MA, Blackburn JK, Blair CD, Blair DG, Blair RM, Bloemen S, Bock O, Boer M, Bogaert G, Bogan C, Bohe A, Bond C, Bondu F, Bonnand R, Boom BA, Bork R, Boschi V, Bose S, Bouffanais Y, Bozzi A, Bradaschia C, Brady PR, Braginsky VB, Branchesi M, Brau JE, Briant T, Brillet A, Brinkmann M, Brisson V, Brockill P, Broida JE, Brooks AF, Brown DA, Brown DD, Brown NM, Brunett S, Buchanan CC, Buikema A, Bulik T, Bulten HJ, Buonanno A, Buskulic D, Buy C, Byer RL, Cabero M, Cadonati L, Cagnoli G, Cahillane C, Calderón Bustillo J, Callister T, Calloni E, Camp JB, Cannon KC, Cao J, Capano CD, Capocasa E, Carbognani F, Caride S, Casanueva Diaz J, Casentini C, Caudill S, Cavaglià M, Cavalier F, Cavalieri R, Cella G, Cepeda CB, Cerboni Baiardi L, Cerretani G, Cesarini E, Chamberlin SJ, Chan M, Chao S, Charlton P, Chassande-Mottin E, Cheeseboro BD, Chen HY, Chen Y, Cheng C, Chincarini A, Chiummo A, Cho HS, Cho M, Chow JH, Christensen N, Chu Q, Chua S, Chung S, Ciani G, Clara F, Clark JA, Cleva F, Coccia E, Cohadon PF, Colla A, Collette CG, Cominsky L, Constancio M, Conte A, Conti L, Cook D, Corbitt TR, Cornish N, Corsi A, Cortese S, Costa CA, Coughlin MW, Coughlin SB, Coulon JP, Countryman ST, Couvares P, Cowan EE, Coward DM, Cowart MJ, Coyne DC, Coyne R, Craig K, Creighton JDE, Cripe J, Crowder SG, Cumming A, Cunningham L, Cuoco E, Dal Canton T, Danilishin SL, D'Antonio S, Danzmann K, Darman NS, Dasgupta A, Da Silva Costa CF, Dattilo V, Dave I, Davier M, Davies GS, Daw EJ, Day R, De S, DeBra D, Debreczeni G, Degallaix J, De Laurentis M, Deléglise S, Del Pozzo W, Denker T, Dent T, Dergachev V, De Rosa R, DeRosa RT, DeSalvo R, Devine RC, Dhurandhar S, Díaz MC, Di Fiore L, Di Giovanni M, Di Girolamo T, Di Lieto A, Di Pace S, Di Palma I, Di Virgilio A, Dolique V, Donovan F, Dooley KL, Doravari S, Douglas R, Downes TP, Drago M, Drever RWP, Driggers JC, Ducrot M, Dwyer SE, Edo TB, Edwards MC, Effler A, Eggenstein HB, Ehrens P, Eichholz J, Eikenberry SS, Engels W, Essick RC, Etzel T, Evans M, Evans TM, Everett R, Factourovich M, Fafone V, Fair H, Fairhurst S, Fan X, Fang Q, Farinon S, Farr B, Farr WM, Favata M, Fays M, Fehrmann H, Fejer MM, Fenyvesi E, Ferrante I, Ferreira EC, Ferrini F, Fidecaro F, Fiori I, Fiorucci D, Fisher RP, Flaminio R, Fletcher M, Fong H, Fournier JD, Frasca S, Frasconi F, Frei Z, Freise A, Frey R, Frey V, Fritschel P, Frolov VV, Fulda P, Fyffe M, Gabbard HAG, Gair JR, Gammaitoni L, Gaonkar SG, Garufi F, Gaur G, Gehrels N, Gemme G, Geng P, Genin E, Gennai A, George J, Gergely L, Germain V, Ghosh A, Ghosh A, Ghosh S, Giaime JA, Giardina KD, Giazotto A, Gill K, Glaefke A, Goetz E, Goetz R, Gondan L, González G, Gonzalez Castro JM, Gopakumar A, Gordon NA, Gorodetsky ML, Gossan SE, Gosselin M, Gouaty R, Grado A, Graef C, Graff PB, Granata M, Grant A, Gras S, Gray C, Greco G, Green AC, Groot P, Grote H, Grunewald S, Guidi GM, Guo X, Gupta A, Gupta MK, Gushwa KE, Gustafson EK, Gustafson R, Hacker JJ, Hall BR, Hall ED, Hamilton H, Hammond G, Haney M, Hanke MM, Hanks J, Hanna C, Hannam MD, Hanson J, Hardwick T, Harms J, Harry GM, Harry IW, Hart MJ, Hartman MT, Haster CJ, Haughian K, Healy J, Heidmann A, Heintze MC, Heitmann H, Hello P, Hemming G, Hendry M, Heng IS, Hennig J, Henry J, Heptonstall AW, Heurs M, Hild S, Hoak D, Hofman D, Holt K, Holz DE, Hopkins P, Hough J, Houston EA, Howell EJ, Hu YM, Huang S, Huerta EA, Huet D, Hughey B, Husa S, Huttner SH, Huynh-Dinh T, Indik N, Ingram DR, Inta R, Isa HN, Isac JM, Isi M, Isogai T, Iyer BR, Izumi K, Jacqmin T, Jang H, Jani K, Jaranowski P, Jawahar S, Jian L, Jiménez-Forteza F, Johnson WW, Johnson-McDaniel NK, Jones DI, Jones R, Jonker RJG, Ju L, K H, Kalaghatgi CV, Kalogera V, Kandhasamy S, Kang G, Kanner JB, Kapadia SJ, Karki S, Karvinen KS, Kasprzack M, Katsavounidis E, Katzman W, Kaufer S, Kaur T, Kawabe K, Kéfélian F, Kehl MS, Keitel D, Kelley DB, Kells W, Kennedy R, Key JS, Khalili FY, Khan I, Khan S, Khan Z, Khazanov EA, Kijbunchoo N, Kim CW, Kim C, Kim J, Kim K, Kim N, Kim W, Kim YM, Kimbrell SJ, King EJ, King PJ, Kissel JS, Klein B, Kleybolte L, Klimenko S, Koehlenbeck SM, Koley S, Kondrashov V, Kontos A, Korobko M, Korth WZ, Kowalska I, Kozak DB, Kringel V, Krishnan B, Królak A, Krueger C, Kuehn G, Kumar P, Kumar R, Kuo L, Kutynia A, Lackey BD, Landry M, Lange J, Lantz B, Lasky PD, Laxen M, Lazzarini A, Lazzaro C, Leaci P, Leavey S, Lebigot EO, Lee CH, Lee HK, Lee HM, Lee K, Lenon A, Leonardi M, Leong JR, Leroy N, Letendre N, Levin Y, Lewis JB, Li TGF, Libson A, Littenberg TB, Lockerbie NA, Lombardi AL, London LT, Lord JE, Lorenzini M, Loriette V, Lormand M, Losurdo G, Lough JD, Lousto CO, Lück H, Lundgren AP, Lynch R, Ma Y, Machenschalk B, MacInnis M, Macleod DM, Magaña-Sandoval F, Magaña Zertuche L, Magee RM, Majorana E, Maksimovic I, Malvezzi V, Man N, Mandel I, Mandic V, Mangano V, Mansell GL, Manske M, Mantovani M, Marchesoni F, Marion F, Márka S, Márka Z, Markosyan AS, Maros E, Martelli F, Martellini L, Martin IW, Martynov DV, Marx JN, Mason K, Masserot A, Massinger TJ, Masso-Reid M, Mastrogiovanni S, Matichard F, Matone L, Mavalvala N, Mazumder N, McCarthy R, McClelland DE, McCormick S, McGuire SC, McIntyre G, McIver J, McManus DJ, McRae T, McWilliams ST, Meacher D, Meadors GD, Meidam J, Melatos A, Mendell G, Mercer RA, Merilh EL, Merzougui M, Meshkov S, Messenger C, Messick C, Metzdorff R, Meyers PM, Mezzani F, Miao H, Michel C, Middleton H, Mikhailov EE, Milano L, Miller AL, Miller A, Miller BB, Miller J, Millhouse M, Minenkov Y, Ming J, Mirshekari S, Mishra C, Mitra S, Mitrofanov VP, Mitselmakher G, Mittleman R, Moggi A, Mohan M, Mohapatra SRP, Montani M, Moore BC, Moore CJ, Moraru D, Moreno G, Morriss SR, Mossavi K, Mours B, Mow-Lowry CM, Mueller G, Muir AW, Mukherjee A, Mukherjee D, Mukherjee S, Mukund N, Mullavey A, Munch J, Murphy DJ, Murray PG, Mytidis A, Nardecchia I, Naticchioni L, Nayak RK, Nedkova K, Nelemans G, Nelson TJN, Neri M, Neunzert A, Newton G, Nguyen TT, Nielsen AB, Nissanke S, Nitz A, Nocera F, Nolting D, Normandin MEN, Nuttall LK, Oberling J, Ochsner E, O'Dell J, Oelker E, Ogin GH, Oh JJ, Oh SH, Ohme F, Oliver M, Oppermann P, Oram RJ, O'Reilly B, O'Shaughnessy R, Ottaway DJ, Overmier H, Owen BJ, Pai A, Pai SA, Palamos JR, Palashov O, Palomba C, Pal-Singh A, Pan H, Pankow C, Pannarale F, Pant BC, Paoletti F, Paoli A, Papa MA, Paris HR, Parker W, Pascucci D, Pasqualetti A, Passaquieti R, Passuello D, Patricelli B, Patrick Z, Pearlstone BL, Pedraza M, Pedurand R, Pekowsky L, Pele A, Penn S, Perreca A, Perri LM, Pfeiffer HP, Phelps M, Piccinni OJ, Pichot M, Piergiovanni F, Pierro V, Pillant G, Pinard L, Pinto IM, Pitkin M, Poe M, Poggiani R, Popolizio P, Post A, Powell J, Prasad J, Predoi V, Prestegard T, Price LR, Prijatelj M, Principe M, Privitera S, Prix R, Prodi GA, Prokhorov L, Puncken O, Punturo M, Puppo P, Pürrer M, Qi H, Qin J, Qiu S, Quetschke V, Quintero EA, Quitzow-James R, Raab FJ, Rabeling DS, Radkins H, Raffai P, Raja S, Rajan C, Rakhmanov M, Rapagnani P, Raymond V, Razzano M, Re V, Read J, Reed CM, Regimbau T, Rei L, Reid S, Reitze DH, Rew H, Reyes SD, Ricci F, Riles K, Rizzo M, Robertson NA, Robie R, Robinet F, Rocchi A, Rolland L, Rollins JG, Roma VJ, Romano JD, Romano R, Romanov G, Romie JH, Rosińska D, Rowan S, Rüdiger A, Ruggi P, Ryan K, Sachdev S, Sadecki T, Sadeghian L, Sakellariadou M, Salconi L, Saleem M, Salemi F, Samajdar A, Sammut L, Sanchez EJ, Sandberg V, Sandeen B, Sanders JR, Sassolas B, Sathyaprakash BS, Saulson PR, Sauter OES, Savage RL, Sawadsky A, Schale P, Schilling R, Schmidt J, Schmidt P, Schnabel R, Schofield RMS, Schönbeck A, Schreiber E, Schuette D, Schutz BF, Scott J, Scott SM, Sellers D, Sengupta AS, Sentenac D, Sequino V, Sergeev A, Setyawati Y, Shaddock DA, Shaffer T, Shahriar MS, Shaltev M, Shapiro B, Shawhan P, Sheperd A, Shoemaker DH, Shoemaker DM, Siellez K, Siemens X, Sieniawska M, Sigg D, Silva AD, Singer A, Singer LP, Singh A, Singh R, Singhal A, Sintes AM, Slagmolen BJJ, Smith JR, Smith ND, Smith RJE, Son EJ, Sorazu B, Sorrentino F, Souradeep T, Srivastava AK, Staley A, Steinke M, Steinlechner J, Steinlechner S, Steinmeyer D, Stephens BC, Stevenson SP, Stone R, Strain KA, Straniero N, Stratta G, Strauss NA, Strigin S, Sturani R, Stuver AL, Summerscales TZ, Sun L, Sunil S, Sutton PJ, Swinkels BL, Szczepańczyk MJ, Tacca M, Talukder D, Tanner DB, Tápai M, Tarabrin SP, Taracchini A, Taylor R, Theeg T, Thirugnanasambandam MP, Thomas EG, Thomas M, Thomas P, Thorne KA, Thrane E, Tiwari S, Tiwari V, Tokmakov KV, Toland K, Tomlinson C, Tonelli M, Tornasi Z, Torres CV, Torrie CI, Töyrä D, Travasso F, Traylor G, Trifirò D, Tringali MC, Trozzo L, Tse M, Turconi M, Tuyenbayev D, Ugolini D, Unnikrishnan CS, Urban AL, Usman SA, Vahlbruch H, Vajente G, Valdes G, Vallisneri M, van Bakel N, van Beuzekom M, van den Brand JFJ, Van Den Broeck C, Vander-Hyde DC, van der Schaaf L, van Heijningen JV, van Veggel AA, Vardaro M, Vass S, Vasúth M, Vaulin R, Vecchio A, Vedovato G, Veitch J, Veitch PJ, Venkateswara K, Verkindt D, Vetrano F, Viceré A, Vinciguerra S, Vine DJ, Vinet JY, Vitale S, Vo T, Vocca H, Vorvick C, Voss DV, Vousden WD, Vyatchanin SP, Wade AR, Wade LE, Wade M, Walker M, Wallace L, Walsh S, Wang G, Wang H, Wang M, Wang X, Wang Y, Ward RL, Warner J, Was M, Weaver B, Wei LW, Weinert M, Weinstein AJ, Weiss R, Wen L, Weßels P, Westphal T, Wette K, Whelan JT, Whiting BF, Williams RD, Williamson AR, Willis JL, Willke B, Wimmer MH, Winkler W, Wipf CC, Wittel H, Woan G, Woehler J, Worden J, Wright JL, Wu DS, Wu G, Yablon J, Yam W, Yamamoto H, Yancey CC, Yu H, Yvert M, Zadrożny A, Zangrando L, Zanolin M, Zendri JP, Zevin M, Zhang L, Zhang M, Zhang Y, Zhao C, Zhou M, Zhou Z, Zhu XJ, Zucker ME, Zuraw SE, Zweizig J, Boyle M, Hemberger D, Kidder LE, Lovelace G, Ossokine S, Scheel M, Szilagyi B, Teukolsky S. GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence. PHYSICAL REVIEW LETTERS 2016; 116:241103. [PMID: 27367379 DOI: 10.1103/physrevlett.116.241103] [Citation(s) in RCA: 282] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Indexed: 05/21/2023]
Abstract
We report the observation of a gravitational-wave signal produced by the coalescence of two stellar-mass black holes. The signal, GW151226, was observed by the twin detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) on December 26, 2015 at 03:38:53 UTC. The signal was initially identified within 70 s by an online matched-filter search targeting binary coalescences. Subsequent off-line analyses recovered GW151226 with a network signal-to-noise ratio of 13 and a significance greater than 5σ. The signal persisted in the LIGO frequency band for approximately 1 s, increasing in frequency and amplitude over about 55 cycles from 35 to 450 Hz, and reached a peak gravitational strain of 3.4_{-0.9}^{+0.7}×10^{-22}. The inferred source-frame initial black hole masses are 14.2_{-3.7}^{+8.3}M_{⊙} and 7.5_{-2.3}^{+2.3}M_{⊙}, and the final black hole mass is 20.8_{-1.7}^{+6.1}M_{⊙}. We find that at least one of the component black holes has spin greater than 0.2. This source is located at a luminosity distance of 440_{-190}^{+180} Mpc corresponding to a redshift of 0.09_{-0.04}^{+0.03}. All uncertainties define a 90% credible interval. This second gravitational-wave observation provides improved constraints on stellar populations and on deviations from general relativity.
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Zhao YJ, Chen WX, Wu DS, Zhang WY, Zheng LR. Differentiation of mass-forming intrahepatic cholangiocarcinoma from poorly differentiated hepatocellular carcinoma: based on the multivariate analysis of contrast-enhanced computed tomography findings. Abdom Radiol (NY) 2016; 41:978-89. [PMID: 27193795 DOI: 10.1007/s00261-015-0629-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE We aim to gain further insight into identifying differential radiological features of mass-forming intrahepatic cholangiocarcinoma (mICC) from poorly differentiated hepatocellular carcinoma (pHCC) on contrast-enhanced computed tomography (CT). MATERIALS AND METHODS 107 patients with pathologically confirmed mICC (n = 48) and pHCC (n = 59) who had undergone preoperative contrast-enhanced CT were enrolled. Qualitative analysis of CT images were evaluated for tumor demarcation, shape, presence of satellite nodules, capsular retraction, biliary involvement, intratumoral arteries, tortuous tumoral vessels, vascular invasion, portal vein tumor thrombus, arterial enhancement pattern, portal venous phase enhancement, and washout pattern. Quantitative analysis was performed for mean attenuation of tumor and tumor-to-liver contrast during each phase. The degree of arterial enhancement was graded based on quantitative measurements. RESULTS A lobulated shape, indistinct margin, peripheral rim enhancement in the arterial phase, and the presence of bile duct dilatation were CT features favoring mICC, whereas a round shape, partially indistinct margin, heterogeneous enhancement in the arterial phase, washout pattern and the presence of tortuous tumoral vessels were CT features favoring pHCC in the univariate analysis (P < 0.05). Tumor-to-liver contrast of pHCC was greater than that of mICC during the arterial phase (P = 0.015). In the multivariate analysis, bile duct dilatation, tortuous tumoral vessels, and a washout pattern were independent CT features for distinguishing between the two types. (P = 0.003, P = 0.003, P = 0.044, respectively). CONCLUSION The absence of a washout pattern and tortuous tumoral vessels and presence of bile duct dilatation are more indicative of mICC than of pHCC on contrast-enhanced CT.
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Wang XP, Chen WX, Wu DS, Wang XD. [Whole-liver perfusion scans with 64-slice spiral CT in patients with liver cirrhosis]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2011; 42:382-386. [PMID: 21827004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To test the value of whole-liver perfusion in demonstrating liver angiography and assessing the degree of liver cirrhosis. METHODS Forty patients with confirmed liver cirrhosis (patient group) and twenty patients without any liver abnormalities (control group) were prospectively enrolled in this study. All patients underwent whole-liver perfusion CT scans. The time density curve (TDC), hepatic arterial perfusion (HAP), hepatic portal perfusion (HPP) and total liver perfusion (TLP) were measured using a special software for the whole-liver perfusion. The CTA imaging of hepatic vessels was obtained by reconstructing the single scanning images. The peak values and time to reach peak values of abdominal aorta and portal veins and the hepatic perfusion parameters were measured. The collateral vessels were observed. RESULTS Delay in the time to reach peak values and reduced peak values of the abdominal aorta and portal veins in patients with live cirrhosis were observed compared to the controls (P < 0.05). The HAP value in Child A was higher than those in Child B, C and the controls (P < 0.05). The HPP and TLP values decreased gradually in Child A, B and C, all with significance compared to the controls (P < 0.05). The HPI values in Child C was higher than those in other groups (P < 0.05). Reconstructed CTA images showed that different collateral vessels were developed at the end-stage of chronic liver cirrhosis due to severe portal hypertension. The parameters of HPP and TLP in the group with more collateral vessels development were greater than those in other groups (P < 0.05). CONCLUSION The whole-liver perfusion is valuable in evaluation the severity of liver cirrhosis. The CT angiography can precisely illustrate the hepatic vascular anatomy of liver and the collateral vessels.
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Wang HX, Cheng WD, Chen DG, Zhang H, Wu DS, Gong YJ. Li3AIB2O6: Synthesis, Crystal Structure, and Its Luminescence Property Compared with LiSrBO3. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20040220304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Wu CC, Wu DS, Lin PR, Chen TN, Horng RH. Realization and manipulation of ZnO nanorod arrays on sapphire substrates using a catalyst-free metalorganic chemical vapor deposition technique. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2010; 10:3001-3011. [PMID: 20358892 DOI: 10.1166/jnn.2010.2171] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Single-crystalline ZnO nanorod arrays (ZNRs) were grown by metalorganic chemical vapor deposition on ZnO buffer/sapphire substrate without using any metal catalyst. The density of vertically aligned ZNRs was found to govern by the morphology and thickness of buffer layer. That is to say, the ZnO buffer layer can be used as the nucleation template to control the growth direction and density of the ZNRs. In addition, by controlling the diethyl zinc flow rate, we can manipulate the size, crystal, and optical quality of ZNRs. Finally, the possible growth mechanism of ZNRs was discussed in detail.
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Lin H, Xu L, Jing J, Li G, Zhu Y, Wu DS, Xu YY, Wu Y. A Convenient Multiple Source Model for VARIAN 2300C 6 MV-X Beam Based on Monte Carlo Simulated Linac. NUCL TECHNOL 2009. [DOI: 10.13182/nt09-a9294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Wu DS, Chen WX, Wang XP. Ectopic pancreaticobiliary drainage accompanied by proximal jejunal adenoma: A case report. World J Gastroenterol 2009; 15:4467-70. [PMID: 19764105 PMCID: PMC2747074 DOI: 10.3748/wjg.15.4467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A patient with obstructive jaundice was examined by multidetector row helical computed tomography (MDCT) and magnetic resonance imaging (MRI), and his common bile duct was observed to be leading into the distal portion of the horizontal duodenum with a pancreaticobiliary union outside the duodenal wall. A mass was also found in the proximal jejunum. All the above findings were confirmed by subsequent surgery, thus contrast-enhanced MDCT and MRI with appropriate image post-processing could provide non-invasive and accurate information regarding anatomy and lesions of the pancreaticobiliary duct and duodenal union, which may improve the feasibility of surgery and reduce postoperative complications.
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Shen J, Cheng WD, Wu DS, Huang SP, Hu H, Xie Z. First-Principles Determinations and Investigations of the Electronic Absorption and Third-Order Polarizability Spectra of Electron Donor−Acceptor Chromophores Tetraalkylammonium Halide/Carbon Tetrabromide†. J Phys Chem A 2007; 111:9249-54. [PMID: 17676721 DOI: 10.1021/jp072703+] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Calculations on donor-acceptor molecular pairs of tetraalkylammonium halide/carbon tetrabromide complexes are provided to investigate structure/property-related linear and nonlinear optical properties by using the time-dependent density functional theory technique coupled with the sum-over-states method. The calculated energies of the first allowed electronic transition decrease, and the nonresonant third-order polarizabilities at the THG, EFISHG, and DFWM optical processes increase progressively from [DBU-H+Br-.CBr(4) to [NPr(4)Br.CBr(4)] to [NMe(4)Br.CBr(4)]. The obtained electronic absorption spectra show a progressive red shift with increasing donor strength from Cl to I for [NR(4)h.CBr(4)] (h = Cl, Br, and I). The charge transfers from the halogen donor to the carbon tetrabromide acceptor make significant contributions to the electronic absorption spectra in the low-energy zone and the third-order polarizabilities in the nonresonant frequency region. The counterion indirectly affects the electronic absorption and third-order polarizability spectra through the interactions between the donor and acceptor.
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Huang SP, Wu DS, Hu JM, Zhang H, Xie Z, Hu H, Cheng WD. First-principles study: size-dependent optical properties for semiconducting silicon carbide nanotubes. OPTICS EXPRESS 2007; 15:10947-10957. [PMID: 19547452 DOI: 10.1364/oe.15.010947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Using first-principles calculations, we investigate the effect of tube size on optical properties of the zigzag, armchair, and chiral SiC nanotubes. The results indicate that the optical spectra of SiC nanotubes are dependent on the diameter and chirality, and that optical anisotropy is observed for different light polarizations. For a given chirality of SiCNTs, redshifts or blueshifts of the peaks in the dielectric function and energy loss function with increasing tube diameter are possible due to the competition between the size effect and pi orbitals overlapping, and the shifts become smaller as the tube diameter increases. The unusual optical properties of semiconducting SiC nanotubes present an opportunity for applications in electro-optical devices.
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Cheng WD, Wu DS, Shen J, Huang SP, Xie Z, Zhang H, Gong YJ. From Molecule to Bulk Material: Optical Properties of Hydrogen-Bonded Dimers [C12H12N4O2AgPF6]2 and [C28H28N6O3AgPF6]2 Depend on the Arrangement of the Oxime Moieties. Chemistry 2007; 13:5151-9. [PMID: 17385197 DOI: 10.1002/chem.200601190] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The dependence of the optical properties of [C(12)H(12)N(4)O(2)AgPF(6)](2) (dimer-1) and [C(28)H(28)N(6)O(3)AgPF(6)](2) (dimer-2) on the arrangement of the oxime moieties in the molecule and in bulk crystals was investigated by means of time-dependent density functional theory. Dimer-1 with simple pyridine oxime ligands and a wavy arrangement has a smaller dipole moment and larger transition energy between the two states, and thus smaller third-order polarizabilities and two-photon absorption cross sections. Dimer-2 with extended pyridine oxime ligands and a ladder arrangement has a larger dipole moment and smaller transition energy between the two states, and thus larger third-order polarizabilities and two-photon absorption cross sections. The lowest energy absorption band is red-shifted for dimer-2 as compared with dimer-1, due to more pronounced pi-pi delocalization interactions and weaker hydrogen bonding in dimer-2. The electronic absorption spectra, frequency-dependent third-order polarizabilities, and two-photon absorption cross sections involve significant contributions from charge transfers from pi/pi* orbitals of the pyridine oxime ligands but no contribution from PF(6) (-) ions or H(2)O molecules in the wavelength range studied for the monomers and dimers of the C(12)H(12)N(4)O(2)AgPF(6) and C(28)H(28)N(6)O(3)AgPF(6) molecules. The third-order susceptibilities and two-photon absorption coefficients of bulk solids were estimated on the basis of the optical properties of the corresponding dimers, and the bulk material constructed from dimer-2 has the larger optical parameters of the two.
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Zou JP, Wu DS, Huang SP, Zhu J, Guo GC, Huang JS. Synthesis, crystal and band structures, and properties of a new supramolecular complex (Hg2As)2(CdI4). J SOLID STATE CHEM 2007. [DOI: 10.1016/j.jssc.2006.11.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhu J, Cheng WD, Wu DS, Zhang H, Gong YJ, Tong HN, Zhao D. Synthesis, Crystal Structure, and Optical Properties of LiGd5P2O13, a Layered Lithium Gadolinium Phosphate Containing One-Dimensional Li Chains. Inorg Chem 2007; 46:208-12. [PMID: 17198429 DOI: 10.1021/ic061536+] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A lithium gadolinium phosphate crystal, LiGd5P2O13, has been synthesized by a high temperature solution reaction and solved by single-crystal X-ray diffraction data. The structure is monoclinic, space group C2/m, with unit cell parameters a = 18.645(3), b = 5.6257(5), c = 12.014(2) A, beta = 117.55(6)degrees, V = 1117.3(3) A3, and Z = 4. LiGd5P2O13 presents a new structural type and is built up from [Gd5P2O13]- layers and one-dimensional Li chains with an unusual Li-Li distance. The optical properties were investigated in terms of the absorption and emission spectra. Additionally, the calculations of band structure, density of states, dielectric constants, and refractive indexes were performed with the density functional threory method. The obtained results tend to support the experimental data.
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Shen J, Cheng WD, Wu DS, Lan YZ, Li FF, Huang SP, Zhang H, Gong YJ. Theoretical Study of Two-Photon Absorption in Donor−Acceptor Chromophores Tetraalkylammonium Halide/Carbon Tetrabromide. J Phys Chem A 2006; 110:10330-5. [PMID: 16928126 DOI: 10.1021/jp063108v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Two-photon absorption properties of a series of donor-acceptor chromophores of tetraalkylammonium halide/carbon tetrabromide ([NR4h.CBr4], h = Cl, Br, I; R = Me, Et, Pr) complexes are investigated in terms of the calculated results by the time-dependent density functional theory (TDDFT) technique combined with the sum-over-states (SOS) method. The modeling two-photon absorption spectra show that these charge-transfer complexes have large two-photon absorption (TPA) cross sections and the [NEt4I.CBr4] has the largest TPA cross section delta with the value of 5.0 x 10(-45) cm4 s photon(-1). The maximum values of delta increase with increasing separations between the donor/acceptor in the order Cl...Br < Br...Br < I...Br for [NEt4h.CBr4] complexes; however, the TPA cross sections delta vary slightly as the size of the alkyl group increases from methyl to propyl for the bromide as a donor, and the maximum wavelength of the TPA peak lambdamax indicates a bathochromic shift. The charge transfers from the halide anion to the carbon tetrabromide make a significant contribution to the excited states, and the donor-acceptor charge transfer plays an important role in the TPA activity, whereas changes in size of alkyl group do not make a substantial contribution to TPA.
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Wu WS, Cheng WD, Wu DS, Zhang H, Gong YJ, Lu Y. Crystal structure, magnetic and optical properties of (2-picoloylcarbonyl) thiosemicarbazonatocopper(II) ([Cu3L2(H2O)2]·2ClO4·3H2O, and L=[C7H8N4OS]2−). INORG CHEM COMMUN 2006. [DOI: 10.1016/j.inoche.2006.02.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Li FF, Wu DS, Lan YZ, Shen J, Huang SP, Cheng WD, Zhang H, Gong YJ. SOS∥TDDFT study on the dynamic third-order nonlinear optical properties of aniline oligomers based on the optimized configurations. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lin H, Wu DS, Wu AD. Effects of internal and external scatter on the build-up characteristics of Monte Carlo calculated absorbed dose for electron irradiation. AUSTRALASIAN PHYSICAL & ENGINEERING SCIENCES IN MEDICINE 2005; 28:165-71. [PMID: 16250470 DOI: 10.1007/bf03178710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The effects of internal and external scatter on surface, build-up and depth dose characteristics simulated by Monte Carlo code EGSnrc for varying field size and SSD for a 10 MeV monoenergetic electron beam with and without an accelerator model are extensively studied in this paper. In particular, sub-millimetre surface PDD was investigated. The percentage depth doses affected significantly by the external scatter show a larger build-up dose. A forward shifted Dmax depth and a sharper fall-off region compared to PDDs with only internal scatter considered. The surface dose with both internal and external scatter shows a marked decrease at 110 cm SSD, and then slight further changes with the increasing SSD since few external scattered particles from accelerator model can reach the phantom for large SSDs. The sharp PDD increase for the 5 cm x 5 cm field compared to other fields seen when only internal scatter is considered is significantly less when external scatter is also present. The effect of external scatter on surface PDD is more pronounced for large fields than small fields (5 cm x 5 cm field).
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Lin H, Wu DS, Wu AD. Effects of treatment distance and field size on build-up characteristics of Monte Carlo calculated absorbed dose for electron irradiation. AUSTRALASIAN PHYSICAL & ENGINEERING SCIENCES IN MEDICINE 2005; 27:219-23. [PMID: 15712590 DOI: 10.1007/bf03178652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Surface, build-up and depth dose characteristics of a monoenergetic electron point source simulated by Monte Carlo code MCNP4c for varying field size and SSD are extensively studied in this paper. MCNP4c (Monte Carlo N-Particle Transport Code System) has been extensively used in clinical dose simulation for its versatility and powerful geometrical coding tool. A sharp increase in PDD is seen with the Monte Carlo Modelling immediately at the surface within the first 0.2 mm. This effect cannot be easily measured by experimental instruments for electron contamination, and may lead to a clinical underdosing of the basal cell layer, which is one of the most radiation sensitive layers and the main target for skin carcinogenesis. A high percentage build-up dose for electron irradiation was shown. No significant effects in surface PDDs were modelled with different SSD values from 95 cm to 125 cm. Three depths were studied in detail, these being 0.05 mm, the lower depth of the basal cell layer; 0.95 mm, the lower depth of the dermal layer; and 0.95 cm, a position within the subcutaneous tissue. Results showed only small surface PDD differences were modelled for SSD variations from 95 cm to 125 cm and field sizes variation from the values between 5 cm and 10 cm squares to 25 cm. When the field side length is smaller than this, the surface dose shows an increasing trend by about 7% at 5 x 5 cm2.
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Li XD, Cheng WD, Wu DS, Lan YZ, Zhang H, Gong YJ, Li FF, Shen J. Modeling of configurations and third-order nonlinear optical properties of C36 and C34X2 (X=B,N). J Chem Phys 2004; 121:5885-92. [PMID: 15367016 DOI: 10.1063/1.1784775] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Using the ab initio method, the geometrical structures of C(36) and the X (B,N)-doped isomers C(34)X(2) have been optimized. On the basis of the optimized structures, then, the third-order nonlinear optical polarizabilities gamma in the different optical processes of the third-harmonic generation, electric-field induced second-harmonic generation and degenerate four-wave mixing, and two-photon absorption (TPA) cross sections delta are calculated by using TDB3LYP method coupled with the sum-over-states method. The calculated results show that the one-photon allowed excitation process dominate the two-photon excitation process for C(36)-D(6h), whereas the two-photon allowed excitation process dominate the one-photon excitation process for C(36)-D(2d) and C(34)X(2) (B,N). It is found that the largest resonant TPA peaks of dopant fullerenes have a blueshift and the TPA cross sections have an enhancement compared with those of the parent fullerenes of isomers C(36)-D(6h) and C(36)-D(2d).
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Wang Y, Sudilovsky D, Zhang B, Haughney PC, Rosen MA, Wu DS, Cunha TJ, Dahiya R, Cunha GR, Hayward SW. A human prostatic epithelial model of hormonal carcinogenesis. Cancer Res 2001; 61:6064-72. [PMID: 11507055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The effects of stromal and hormonal environment on the immortalized but nontumorigenic human prostatic epithelial cell line BPH-1 were investigated in an in vivo model. BPH-1 cells were recombined with rat urogenital sinus mesenchyme (UGM), and the tissue recombinants were grafted to the renal capsule of adult male athymic mouse hosts. BPH-1 + UGM recombinants formed solid branching epithelial cords with a well-defined basement membrane. The cords canalized to form ductal structures. The mesenchymal cells formed thick sheets of well-differentiated smooth muscle surrounding the epithelium, reinforcing the idea that the epithelium dictates the patterning of prostatic stromal cells. When hosts carrying BPH-1 + UGM tissue recombinants were exposed to testosterone propionate and 17-beta-estradiol (T + E2), the tissue recombinants responded by forming invasive carcinomas, demonstrating mixed, predominantly squamous as well as adenocarcinomatous (small acinar and mucinous) differentiation. When either untreated or T + E2-treated hosts were castrated, epithelial apoptosis was observed in the grafts. When tumors were removed and regrafted to fresh hosts they grew rapidly. Tumors were serially regrafted through six generations. Histologically these tumors consisted largely of focally keratinizing squamous cell carcinoma with high-grade malignant cytological features. BPH-1 cells grown in the absence of UGM survived at the graft site but did not form tumors or organized structures. This behavior was not influenced by the presence or absence of T + E2 stimulation. These data show that an immortalized, nontumorigenic human prostatic epithelial cell line can undergo hormonal carcinogenesis in response to T + E2 stimulation. In addition, the data demonstrate that the stromal environment plays an important role in mediating hormonal carcinogenesis.
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Abstract
Indinavir sulfate is a protease inhibitor that has been found to be extremely effective in increasing CD4+ cell counts and in decreasing HIV-RNA titers in patients with HIV and AIDS. However, patients receiving indinavir also have been noted to have a significant risk for developing urolithiasis. Published reports of indinavir urolithiasis estimate its incidence at between 4 and 13%. Indinavir has a high urinary excretion with poor solubility in a physiologic pH solution. Consequently, patients develop urinary stones that are principally composed of indinavir or of a mixture of indinavir and other substances, such as calcium oxalate. Similar to other forms of urolithiasis, acute flank pain and hematuria are the typical symptoms of indinavir urolithiasis. Indinavir urolithiasis is unique in that computed tomography, which was once thought to be efficacious in identifying all urinary calculi, is not useful in imaging stones that are composed of pure indinavir. Indinavir urolithiasis generally responds to a conservative regimen of hydration, pain control, and the temporary discontinuation of the medication. Only a minority of patients need surgical intervention. Approximately 10% of patients ultimately need to discontinue indinavir therapy altogether. Indinavir is an antiviral agent that has a significant role in the treatment of AIDS. Although urolithiasis is a significant side effect of indinavir use, limiting its clinical application is not the answer. Rather, physicians need to know more about indinavir urolithiasis to help their patients cope with its potential complications.
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Abstract
Previous studies of bone density in patients with Colles fracture have been inconclusive. We measured bone density at the second metacarpal in 36 postmenopausal women with Colles fracture. The patients were found to have highly significant (P < 0.01) or significant (P < 0.05) differences in the parameters of bone density compared with controls matched for age. The results suggest that osteoporosis is of definite relevance to the etiology of Colles fracture in postmenopausal women.
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Liu CX, Wang JY, Wu DS, Tang ZC. Adaptative responses of tobacco callus cells to simulated microgravity by compensation. MICROGRAVITY QUARTERLY : MGQ 1993; 3:17-21. [PMID: 11541195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Under the rotation-induced gravity compensation, growth rate of callus was repressed by about 44%. Its osmotic and water potential declined by about 22 and 27% respectively. The content of soluble sugar was enhanced by about 123% and that of K+ by about 25%. The permeability of plasmic membrane increased and the lipid peroxidation intensified. When the callus grown under clinostatting were subcultured and returned to stationary conditions, the growth rates and related physiological indications were restored again to or near to the level of the control (SC). Electron microscopic studies showed that nuclear membrane was invaginated so deeply that some of the nuclei were like a starfish. Rough endoplasmic reticulum was diminished. The smooth one observed on the surface of slices was lengthened by almost 8.9 times of the control (SC), the longest one reached to 42 micrometers. They were often concentrated in a corner of the cell. Some of them were rolled into tube-shapes. The amyloplasts were without starch grain. It is assumed that the responses of plant cell to microgravity may be a sort of tolerable unloading reaction on endomembrane system.
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Costa LG, Wu DS, Olibet G, Murphy SD. Formamidine pesticides and alpha 2-adrenoceptors: studies with amitraz and chlordimeform in rats and development of a radioreceptor binding assay. Neurotoxicol Teratol 1989; 11:405-11. [PMID: 2552275 DOI: 10.1016/0892-0362(89)90014-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The interaction of the formamidine pesticides chlordimeform (CDM) and amitraz (AMZ) with rat brain alpha2-adrenoceptors was investigated. Both compounds inhibited the binding of 3H-clonidine and 3H-yohimbine in vitro with IC50 values of 62-68 microM (CDM) and 95-110 nM (AMZ). In vivo administration of AMZ and CDM caused a dose-dependent inhibition of 3H-clonidine binding in rat forebrain. The inhibition was short-lasting (24 hr) following CDM administration, while after AMZ recovery of 3H-clonidine binding occurred only after 72 hr. Good correlations were found between inhibition of brain 3H-clonidine binding by the formamidines and "plasma equivalents" of these compounds and/or their biologically active metabolites, as measured by a new radioreceptor assay. These results suggest that 1) formamidines can interact in vivo with brain alpha 2-adrenoceptors when administered at doses previously shown to cause toxic effects on the central nervous system: and 2) this effect is reversible, both in vivo and in vitro, and appears to be linked to the presence of the formamidines and/or their active metabolites at the receptor sites.
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Costa LG, Olibet G, Wu DS, Murphy SD. Acute and chronic effects of the pesticide amitraz on alpha 2-adrenoceptors in mouse brain. Toxicol Lett 1989; 47:135-43. [PMID: 2545016 DOI: 10.1016/0378-4274(89)90068-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
There is increasing evidence to suggest that several effects of the formamidine pesticide amitraz (AMZ) in mammals are mediated by its interaction with alpha 2-adrenoceptors. AMZ has been shown to inhibit the binding of [3H]clonidine, a specific ligand for alpha 2-adrenoceptors to mouse brain in vitro and after administration in vivo. In the present study we have further investigated and characterized the effects of acute and chronic administration of AMZ on brain alpha 2-adrenoceptors in mice. AMZ caused a dose-dependent inhibition of [3H]clonidine binding. This inhibition was long-lasting (more than 48 h) following a relatively high dose of AMZ (75 mg/kg), while it was of short duration (2 h) following low doses (7.5 and 12.5 mg/kg). The time course of inhibition of [3H]clonidine binding was correlated with the plasma levels of AMZ and/or its active metabolites, measured with a novel radioreceptor binding technique. The alteration of [3H]clonidine binding was due to a decrease in alpha 2-adrenoceptor affinity, with no change in the density of binding sites, and was reversible in vitro upon repeated washing of the membrane preparation. Repeated administration of 7.5 mg/kg or 12.5 mg/kg AMZ, to yield a total dose of 75 mg/kg, showed no evidence of a cumulative effect on brain alpha 2-adrenoceptors.
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