W. Zheng

Publication List Details

Period

1993 - 2009

Number

201

Co-Authors

A High-Pressure Polarized $^3$He Gas Target for Nuclear Physics Experiments Using A Polarized Photon Beam (2009)

Ye, Q., Laskaris, G., Chen, W., Gao, H., Zheng, W., Zong, X., ...

Following the first experiment on three-body photodisintegration of polarized $^3$He utilizing circularly polarized photons from High Intensity Gamma Source (HI$\gamma$S) at Duke Free Electron Laser...

Relaxation of Spin Polarized $^3$He in Mixtures of $^3$He and $^4$He at $\sim$330 mK (2009)

Ye, Q., Gao, H., Zheng, W., Dutta, D., Dubose, F., Golub, R., ...

We report the measurements of depolarization probabilities of polarized $^3$He in a rectangular acrylic cell with a deuterated tetraphenyl butadiene-doped deuterated polystyrene coating filled with...

The consequence of excess configurational entropy on fragility: the case of a polymer/oligomer blend (2009)

Dalle-Ferrier, C., Simon, S., Zheng, W., Badrinarayanan, P., Fennell, T., Frick, B., ...

By taking advantage of the molecular weight dependence of the glass transition of polymers and their ability to form perfectly miscible blends, we propose a way to modify the fragility of a system,...

Stellar Masses of Lyman Break Galaxies, Lyman Alpha Emitters and Radio Galaxies in Overdense Regions at z=4-6 (2009)

Overzier, R. A., Shu, X., Zheng, W., Rettura, A., Zirm, A., Bouwens, R. J., ...

We present new information on galaxies in the vicinity of luminous radio galaxies and quasars at z=4,5,6. These fields were previously found to contain overdensities of Lyman Break Galaxies (LBGs) or...

Emissions from biomass burning in the Yucatan (2009)

Yokelson, R. J., Crounse, J. D., DeCarlo, P. F., Karl, T., Urbanski, S., Atlas, E., ...

In March 2006 two instrumented aircraft made the first detailed field measurements of biomass burning (BB) emissions in the Northern Hemisphere tropics as part of the MILAGRO project. The aircraft...

Evidence of a Two-Component Jet in the Afterglow of GRB 070419A (2009)

Zheng, W., Deng, J.

A two-component jet model is proposed to explain the unusual afterglow of GRB 070419A. Regarding the optical light curve, a wide "jet" with an opening angle of > 30-40 degrees is assumed to produce...

A GRB Follow-up System at the Xinglong Observatory and Detection of the High-Redshift GRB 060927 (2009)

Zheng, W., Deng, J., Zhai, M., Xin, L., Qiu, Y., Wang, J., ...

A gamma-ray burst (GRB) optical photometric follow-up system at the Xinglong Observatory of National Astronomical Observatories of China (NAOC) has been constructed. It uses the 0.8-m Tsinghua-NAOC...

Statistical studies of optically dark gamma-ray bursts in the Swift era (2009)

Zheng, W., Deng, J., Wang, J.

We compare the properties of optically dark GRBs, defined by the optical-to-X-ray spectral index beta_OX=4). The ratio of dark bursts is found to be about 10-20%, and is similar between long bursts,...

View-Oriented Parallel Programming on CMT processors (2009)

J. Zhang, W. Chen, W. Zheng, Z. Huang, Q. Huang, J. Zhang, ...

View-Oriented Parallel Programming (VOPP) is a novel parallel programming model which uses views for communication between multiple processes. With the introduction of views, mutual exclusion and...

Bright Strongly Lensed Galaxies at Redshift z~ 6-7 behind the Clusters Abell 1703 and CL0024+161 (2009)

Zheng, W., Bradley, L. D., Bouwens, R. J., Ford, H. C., Illingworth, G. D., Benitez, N., ...

We report on the discovery of three bright, strongly-lensed objects behind Abell 1703 and CL0024+16 from a dropout search over 25 square arcminutes of deep NICMOS data, with deep ACS optical...

GEMINI 3D spectroscopy of BAL+IR+Fe II QSOs: II. IRAS 04505-2958 an explosive QSO with hypershell and a new scenario for galaxy formation and galaxy end (2009)

Lipari, S., Bergmann, M., Sanchez, S. F., Garcia-Lorenzo, B., Terlevich, R., Mediavilla, E., ...

From a study of BAL + IR + Fe {\sc ii} QSOs (using deep Gemini GMOS-IFU spectroscopy) new results are presented: for IRAS 04505-2958. Specifically, we have studied in detail the out flow (OF) process...

Assessing the regional impacts of Mexico City emissions on air quality and chemistry (2009)

M. Mena-Carrasco, G. R. Carmichael, J. E. Campbell, D. Zimmerman, Y. Tang, B. Adhikary, ...

The impact of Mexico City (MCMA) emissions is examined by studying its effects on air quality, photochemistry, and on ozone production regimes by combining model products and aircraft observations...

A 70-yr record of oxygen-18 variability in accumulation from the Tanggula Mountains, central Tibetan Plateau (2009)

D. R. Joswiak, T. Yao, G. Wu, B. Xu, W. Zheng

A 33 m ice core was retrieved from the Tanggula Mtns, central Tibetan Plateau at 5743 m a.s.l. in August 2005. Annual average δ<sup>18</sup>O ratios were determined for the upper 17...

Emissions from biomass burning in the Yucatan (2009)

R. Yokelson, J. D. Crounse, P. F. DeCarlo, T. Karl, S. Urbanski, E. Atlas, ...

In March 2006 two instrumented aircraft made the first detailed field measurements of biomass burning (BB) emissions in the Northern Hemisphere tropics as part of the MILAGRO project. The aircraft...

Emissions from biomass burning in the Yucatan (2009)

R. J. Yokelson, J. D. Crounse, P. F. DeCarlo, T. Karl, S. Urbanski, E. Atlas, ...

In March 2006 two instrumented aircraft made the first detailed field measurements of biomass burning (BB) emissions in the Northern Hemisphere tropics as part of the MILAGRO project. The aircraft...

Controllable fabrication of carbon nanotubes on catalysts derived from PS-b-P2VP block copolymer template and in situ synthesis of carbon nanotubes/Au nanoparticles composite materials (2009)

Xu, P., Ji, X., Yang, H., Qi, J., Zheng, W., Abetz, V., ...

Highly ordered iron oxide nanoparticles with controlled size and spacing over a large surface area were prepared with polystyrene-block-poly(2-vinyl pyridine) (PS-b-P2VP) diblock copolymer template,...

Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics (2008)

Abat, E., Abbott, B., Abdallah, J., Abdelalim, A. A., Abdesselam, A., ...

A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance...

614 STATISTICAL GEOMETRY ANALYSIS OF PROTEINS: IMPLICA TIONS FOR INVERTED STRUCTURE PREDICTION (2008)

A. Tropsha, R. K. Singh, W. Zheng

The topology of folded proteins from the representative dataset of well-defined three-dimensional protein structures is studied using a statistical geometry approach. Amino acid residues in protein...

Spatially Resolved Far-Ultraviolet Spectroscopy of the Nuclear Region of NGC 1068 (2008)

Zheng, W., Wang, J., Kriss, G. A., Sahnow, D., Allen, M., Dopita, M., ...

We carry out high-resolution FUSE spectroscopy of the nuclear region of NGC 1068. The first set of spectra was obtained with a 30" square aperture that collects all emission from the narrow-line...

An amperometric biosensor based on hemoglobin immobilized in poly(epsilon-caprolactone) film and its application (2008)

Zheng, W, Li, J, Zheng, Y. F.

In this study, poly(epsilon-caprolactone) (PCL) was synthesized using the E-caprolactone (CL) monomer ring-opening polymerization. We demonstrated that the hemoglobin (Hb) entrapped in PCL film could...

Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations (2008)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases made upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC) in the...

Discovery of a Very Bright Strongly-Lensed Galaxy Candidate at z ~ 7.6 (2008)

Bradley, L. D., Bouwens, R. J., Ford, H. C., Illingworth, G. D., Jee, M. J., Benitez, N., ...

Using HST and Spitzer IRAC imaging, we report the discovery of a very bright strongly lensed Lyman break galaxy (LBG) candidate at z~7.6 in the field of the massive galaxy cluster Abell 1689. The...

Lyman break galaxies, Lyα emitters, and a radio galaxy in a protocluster at z = 4.1 (2008)

Overzier, Roderik A., Bouwens, R. J., Cross, N. J. G., Venemans, B. P., Miley, G. K., Zirm, A. W., ...

We present deep HST ACS observations in g_(475)r_(625)i_(775)z_(850) toward the z = 4.1 radio galaxy TN J1338–1942 and its overdensity of >30 spectroscopically confirmed Lyα emitters (LAEs). We...

Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations (2008)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases made upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC) in the...

Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations (2008)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases made upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC) in the...

Lyman Break galaxies, Lyα emitters, and a radio galaxy in a protocluster at z = 4.1 (2008)

Overzier, Roderik A., Bouwens, R. J., Cross, N. J. G., Venemans, B. P., Miley, G. K., Zirm, A. W., ...

We present deep HST ACS observations in g475r625i775z850 toward the z=4.1 radio galaxy TN J1338-1942 and its overdensity of >30 spectroscopically confirmed Lyalpha emitters (LAEs). We select 66 g475...

The rapidly flaring afterglow of the very bright and energetic GRB 070125 (2008)

Updike, A.C., Haislip, J.B., Nysewander, M.C., Fruchter, A.S., Kann, D.A., Klose, S., ...

We report on multiwavelength observations, ranging from X-ray to radio wave bands, of the IPN-localized gamma-ray burst GRB 070125. Spectroscopic observations reveal the presence of absorption lines...

Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations (2008)

C. L. Heald, A. H. Goldstein, J. D. Allan, A. C. Aiken, E. Apel, E. L. Atlas, ...

Measurements of organic carbon compounds in both the gas and particle phases made upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC) in the...

Assessing the regional impacts of Mexico City emissions on air quality and chemistry (2008)

M. Mena-Carrasco, G. R. Carmichael, J. E. Campbell, D. Zimmerman, Y. Tang, B. Adhikary, ...

The impact of Mexico City (MCMA) emissions is examined by studying its effects on air quality, photochemistry, and on ozone production regimes by combining model products and aircraft observations...

Total Observed Organic Carbon (TOOC): A synthesis of North American observations (2007)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases measured upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC)...

Gemini GMOS IFU Spectroscopy of IRAS 04505-2958: A New Exploding BAL + IR + Fe II QSO (2007)

Lipari, S., Bergmann, M., Sanchez, S., Terlevich, R., Taniguchi, Y., Mediavilla, E., ...

New results of a Programme of study of BAL + IR + Fe II QSOs (at low and high redshift) are presented. Which are based mainly on deep Gemini GMOS integral field unit (IFU/3D) spectroscopy. We have...

Comments to the status of solving lattice Hamiltonian QCD (2007)

C. J. Hamer, W. Zheng, D. Schütte

A review is given on the structure of the many-body problem and on methods of its approximate solution for various lattice gauge theories. Apart from QCD, several examples of lattice SU(n) Yang Mills...

erg cm (2007)

G. A. Kriss, B. R. Espey, J. H. Krolik, Z. Tsvetanov, W. Zheng, A. F. Davidsen

We observed the Seyfert 1 galaxy NGC 3516 twice during the flight of Astro-2 using the Hopkins Ultraviolet Telescope aboard the space shuttle Endeavour in March 1995. Simultaneous X-ray observations...

The Role of Exploding QSOs in Explosive Models of Evolution, Formation and End of Galaxies (2007)

Lipari, S., Bergmann, M., Sanchez, S. F., Terlevich, R., Mediavilla, E., Punsly, B., ...

In this work we analise the role and evidence of exploding BAL + IR + Fe II QSOs, and their relation with new -and previous- explosive models for evolution, formation and end of galaxies.

VLT and ACS observations of RDCS J1252.9-2927: dynamical structure and galaxy populations in a massive cluster at z=1.237 (2007)

Demarco, R., Rosati, P., Lidman, C., Girardi, M., Nonino, M., Rettura, A., ...

We present results from an extensive spectroscopic survey, carried out with VLT FORS, and from an extensive multiwavelength imaging data set from the HST Advanced Camera for Surveys and ground based...

Total Observed Organic Carbon (TOOC): A synthesis of North American observations (2007)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases measured upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC)...

Influence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-B (2007)

Wolfe, G. M., Thornton, J. A., Faye Mcneill, V., Jaffe, D. A., Reidmiller, D., Chand, D., ...

We present month-long observations of speciated acyl peroxy nitrates (APNs), including PAN, PPN, MPAN, APAN, and the sum of PiBN and PnBN, measured at the Mount Bachelor Observatory (MBO) as part of...

Influence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-B (2007)

Wolfe, G. M., Thornton, J. A., Mcneill, V. F., Jaffe, D. A., Reidmiller, D., Chand, D., ...

We present month-long observations of speciated acyl peroxy nitrates (APNs), including PAN, PPN, MPAN, APAN, and the sum of PiBN and PnBN, measured at the Mount Bachelor Observatory (MBO) as part of...

Total Observed Organic Carbon (TOOC): A synthesis of North American observations (2007)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases measured upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC)...

Influence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-B (2007)

Wolfe, G. M., Thornton, J. A., Faye Mcneill, V., Jaffe, D. A., Reidmiller, D., Chand, D., ...

We present month-long observations of speciated acyl peroxy nitrates (APNs), including PAN, PPN, MPAN, APAN, and the sum of PiBN and PnBN, measured at the Mount Bachelor Observatory (MBO) as part of...

Influence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-B (2007)

Wolfe, G. M., Thornton, J. A., Mcneill, V. F., Jaffe, D. A., Reidmiller, D., Chand, D., ...

We present month-long observations of speciated acyl peroxy nitrates (APNs), including PAN, PPN, MPAN, APAN, and the sum of PiBN and PnBN, measured at the Mount Bachelor Observatory (MBO) as part of...

Excitation spectra and ground state properties of the layered spin-½ frustrated antiferromagnets Cs2CuCl4 and Cs2CuBr4 (Abstract) (2007)

Fjaerestad, J. O., Zheng, W., Singh, R. R. P., McKenzie, R. H., Coldea, R.

We use series expansion methods to study ground- and excited-state properties in the helically ordered phase of spin-1/2 frustrated antiferromagnets on an anisotropic triangular lattice. We calculate...

Excitation spectra and ground state properties of the layered spin-½ frustrated antiferromagnets Cs2CuCl4 and Cs2CuBr4 (Abstract) (2007)

Fjaerestad, J. O., Zheng, W., Singh, R. R. P., McKenzie, R. H., Coldea, R.

We use series expansion methods to study ground- and excited-state properties in the helically ordered phase of spin-1/2 frustrated antiferromagnets on an anisotropic triangular lattice. We calculate...

Influence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-B (2007)

G. M. Wolfe, J. A. Thornton, V. F. McNeill, D. A. Jaffe, D. Reidmiller, D. Chand, ...

We present month-long observations of speciated acyl peroxy nitrates (APNs), including PAN, PPN, MPAN, APAN, and the sum of PiBN and PnBN, measured at the Mount Bachelor Observatory (MBO) as part of...

Influence of trans-Pacific pollution transport on acyl peroxy nitrate abundances and speciation at Mount Bachelor Observatory during INTEX-B (2007)

G. M. Wolfe, J. A. Thornton, V. Faye McNeill, D. A. Jaffe, D. Reidmiller, D. Chand, ...

We present month-long observations of speciated acyl peroxy nitrates (APNs), including PAN, PPN, MPAN, APAN, and the sum of PiBN and PnBN, measured at the Mount Bachelor Observatory (MBO) as part of...

Total Observed Organic Carbon (TOOC): A synthesis of North American observations (2007)

C. L. Heald, A. H. Goldstein, J. D. Allan, A. C. Aiken, E. Apel, E. L. Atlas, ...

Measurements of organic carbon compounds in both the gas and particle phases measured upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC)...

Most hard X-ray selected quasars in Chandra Deep Fields are obscured (2006)

Wang, J. X., Jiang, P., Zheng, Z. Y., Tozzi, P., Norman, C., Giacconi, R., ...

Measuring the population of obscured quasars is one of the key issues to understand the evolution of active galactic nuclei (AGNs). With a redshift completeness of 99%, the X-ray sources detected in...

Deep GEMINI GMOS-IFU spectroscopy of BAL QSOs: I. Decoupling the BAL, QSO, starburst, NLR, supergiant bubbles and galactic wind in Mrk 231 (2006)

Lipari, S., Sanchez, S. F., Bergmann, M., Terlevich, R., Garcia-Lorenzo, B., Punsly, B., ...

In this work we present the first results of a study of BAL QSOs (at low and high redshift), based on very deep Gemini GMOS integral field spectroscopy. In particular, the results obtained for the...

A Study of the Reionization History of Intergalactic Helium with FUSE and VLT (2006)

Zheng, W., Kriss, G. A., Dixon, W. V., Kruk, J. W., Shull, J. M., ...

We obtained high-resolution VLT and FUSE spectra of the quasar HE2347-4342 to study the properties of the intergalactic medium between redshifts z=2.0-2.9. The high-quality optical spectrum allows us...

The UV spectrum of HS1700+6416 II. FUSE observations of the HeII Lyman alpha forest (2006)

Fechner, C., Reimers, D., Kriss, G. A., Baade, R., Blair, W. P., Giroux, M. L., ...

We present the far-UV spectrum of the quasar HS1700+6416 taken with FUSE. This QSO provides the second line of sight with the HeII absorption resolved into a Ly alpha forest structure. Since...

HST/ACS Multiband Coronagraphic Imaging of the Debris Disk around Beta Pictoris (2006)

Golimowski, D. A., Ardila, D. R., Krist, J. E., Clampin, M., Ford, H. C., Illingworth, G. D., ...

(Abridged.) We present F435W (B), F606W (Broad V), and F814W (Broad I) coronagraphic images of the debris disk around Beta Pictoris obtained with HST's Advanced Camera for Surveys. We confirm that...

X-ray spectral properties of AGN in the Chandra Deep Field South (2006)

Tozzi, P., Gilli, R., Mainieri, V., Norman, C., Risaliti, G., Rosati, P., ...

We present a detailed X-ray spectral analysis of the sources in the 1Ms catalog of the Chandra Deep Field South (CDFS) taking advantage of optical spectroscopy and photometric redshifts for 321...

Lyman break galaxies, Lya emitters and a radio galaxy in a protocluster at z=4.1 (2006)

Overzier, Roderik A., Bouwens, R. J., Cross, N. J. G., Venemans, B., Miley, G. K., Zirm, A. W., ...

We present deep HST/ACS observations in g,r,i,z towards the z=4.1 radio galaxy TN J1338-1942 and its overdensity of >30 spectroscopically confirmed Lya emitters (LAEs). We select 66 g-band dropouts...

Seventy-One New L and T Dwarfs from the Sloan Digital Sky Survey (2006)

Chiu, K., Fan, X., Leggett, S. K., Golimowski, D. A., Zheng, W., Geballe, T. R., ...

We present near-infrared observations of 71 newly discovered L and T dwarfs, selected from imaging data of the Sloan Digital Sky Survey (SDSS) using the i-dropout technique. Sixty-five of these...

Discussion of Air-Conditioning Energy-Savings in Hot-Summer and Cold-Winter Regions (2006)

Zheng, W., Gong, F., Lou, X., Cheng, J.

Introducing several kinds of air-conditioning systems energy conservation measures, and according to the climate of the hot-summer and cold-winter region in China, this paper puts forward an overall...

Discussion of Air-Conditioning Energy-Savings in Hot-Summer and Cold-Winter Regions (2006)

Zheng, W., Gong, F., Lou, X., Cheng, J.

Introducing several kinds of air-conditioning systems energy conservation measures, and according to the climate of the hot-summer and cold-winter region in China, this paper puts forward an overall...

Excitation spectra of the spin-1/2 triangular-lattice Heisenberg antiferromagnet (2006)

Zheng, W., Fjaerestad, J. O., Singh, R. R. P., McKenzie, R. H., Coldea, R.

We use series expansion methods to calculate the dispersion relation of the one-magnon excitations for the spin-(1)/(2) triangular-lattice nearest-neighbor Heisenberg antiferromagnet above a...

Critical behavior of one-particle spectral weights in the transverse Ising model (2006)

Hamer, C. J., Otimaa, J., Zheng, W., McKenzie, R.H.

We investigate the critical behavior of the spectral weight of a single quasiparticle, one of the key observables in experiment, for the particular case of the transverse Ising model. Series...

Critical behavior of one-particle spectral weights in the transverse Ising model (2006)

Hamer, C. J., Otimaa, J., Zheng, W., McKenzie, R.H.

We investigate the critical behavior of the spectral weight of a single quasiparticle, one of the key observables in experiment, for the particular case of the transverse Ising model. Series...

Excitation spectra of the spin-1/2 triangular-lattice Heisenberg antiferromagnet (2006)

Zheng, W., Fjaerestad, J. O., Singh, R. R. P., McKenzie, R. H., Coldea, R.

We use series expansion methods to calculate the dispersion relation of the one-magnon excitations for the spin-(1)/(2) triangular-lattice nearest-neighbor Heisenberg antiferromagnet above a...

An Overdensity of Galaxies near the Most Distant Radio-Loud Quasar (2005)

Zheng, W., Overzier, R., Bouwens, R. J., White, R. L., Ford, H. C., Benitez, N., ...

A five square arcminute region around the luminous radio-loud quasar SDSS J0836+0054 (z=5.8) hosts a wealth of associated galaxies, characterized by very red (1.3 < i_775 - z_{850} < 2.0) color. The...

The Spectral Energy Distribution of the Seyfert galaxy Ton S180 (2005)

Turner, T. J., Romano, P., Kraemer, S. B., George, I. M., Yaqoob, T., Crenshaw, D. M., ...

We present spectral results from a multi-satellite, broad-band campaign on the Narrow-line Seyfert 1 galaxy Ton S180 performed at the end of 1999. We discuss the spectral-energy distribution of the...

The Ionized Gas and Nuclear Environment in NGC 3783 V. Variability and Modeling of the Intrinsic Ultraviolet Absorption (2005)

Gabel, J. R., Kraemer, S. B., Crenshaw, D. M., George, I. M., Brandt, W. N., Hamann, F. W., ...

We present results on the location, physical conditions, and geometry of the outflow in the Seyfert 1 galaxy NGC 3783 from a study of the variable intrinsic UV absorption. Based on 18 observations...

A Dynamical Simulation of the Debris Disk Around HD 141569A (2005)

Ardila, D. R., Lubow, S. H., Golimowski, D. A., Krist, J. E., Clampin, M., Ford, H. C., ...

We study the dynamical origin of the structures observed in the scattered-light images of the resolved debris disk around HD 141569A. We explore the roles of radiation pressure from the central star,...

The Chandra Deep Field South/GOODS survey. Optically faint X-ray sources (2005)

Mainieri, V., Rosati, P., Tozzi, P., Bergeron, J., Gilli, R., Hasinger, G., ...

We provide important new constraints on the nature and redshift distribution of optically faint (R>25) X-ray sources in the Chandra Deep Field South Survey. We show that we can derive accurate...

IR mergers and IR QSOs with galactic winds. III. Mrk 231: composite outflow with multiple expanding bubbles and BALs (an exploding young QSO?) (2005)

Lipari, S., Terlevich, R., Zheng, W., Garcia-Lorenzo, B., Sanches, S., Bergmann, M.

A study of outflow (OF) and BAL systems in Mrk 231 (and in similar IR QSOs) is presented. This study is based mainly on 1D and 2D spectroscopy (obtained at La Palma/WHT, HST, IUE, ESO/NTT, KPNO, APO...

Temperature dependence of the magnetic susceptibility for triangular-lattice antiferromagnets with spatially anisotropic exchange constants (2005)

Zheng, W., Singh, R. R. P., McKenzie, R. H., Coldea, R.

We present the temperature dependence of the uniform susceptibility of spin-half quantum antiferromagnets on spatially anisotropic triangular lattices, using high-temperature series expansions. We...

Eulerian superpath approach to correct sequencing error in shotgun assembly (2005)

Shi, W., Zhou, Wanlei, Zheng, W.

This work describes an error correction method based on the Euler Superpath problem. Sequence data is mapped to an Euler Superpath dynamically by Merging Transformation. With restriction and guiding...

Eulerian superpath approach to correct sequencing error in shotgun assembly (2005)

Shi, W., Zhou, Wanlei, Zheng, W.

This work describes an error correction method based on the Euler Superpath problem. Sequence data is mapped to an Euler Superpath dynamically by Merging Transformation. With restriction and guiding...

Temperature dependence of the magnetic susceptibility for triangular-lattice antiferromagnets with spatially anisotropic exchange constants (2005)

Zheng, W., Singh, R. R. P., McKenzie, R. H., Coldea, R.

We present the temperature dependence of the uniform susceptibility of spin-half quantum antiferromagnets on spatially anisotropic triangular lattices, using high-temperature series expansions. We...

Eulerian superpath approach to correct sequencing error in shotgun assembly (2005)

Shi, W., Zhou, Wanlei, Zheng, W.

This work describes an error correction method based on the Euler Superpath problem. Sequence data is mapped to an Euler Superpath dynamically by Merging Transformation. With restriction and guiding...

The Luminosity Functions of the Galaxy Cluster MS1054-0321 at z=0.83 based on ACS Photometry (2004)

Goto, Tomotsugu, Postman, Marc, Cross, Nicholas J. G., Illingworth, G. D., Tran, K., Magee, D., ...

We present new measurements of the galaxy luminosity function (LF) and its dependence on local galaxy density, color, morphology, and clustocentric radius for the massive z=0.83 cluster MS1054-0321....

Classification and Characterization of Objects from GALEX and SDSS surveys (2004)

Bianchi, Luciana, Seibert, M., Zheng, W., Thilker, D., Friedman, P., Wyder, T., ...

We use the GALEX (Galaxy Evolution Explorer) Medium Imaging Survey (MIS) and All-Sky Imaging Survey (AIS) data available in the first internal release, matched to the SDSS catalogs in the overlapping...

The spatial clustering of X-ray selected AGN and galaxies in the Chandra Deep Field South and North (2004)

Gilli, R., Daddi, E., Zamorani, G., Tozzi, P., Borgani, S., Bergeron, J., ...

We investigate the spatial clustering of X-ray selected sources in the two deepest X-ray fields to date, namely the 2Msec Chandra Deep Field North (CDFN) and the 1Msec Chandra Deep Field South...

The Luminosity Function of Early-Type Galaxies at z~0.75 (2004)

Cross, N. J. G., Bouwens, R., Benitez, N., Blakeslee, J. P., Menanteau, F., Ford, H. C., ...

We measure the luminosity function of morphologically selected E/S0 galaxies from $z=0.5$ to $z=1.0$ using deep high resolution Advanced Camera for Surveys imaging data. Our analysis covers an area...

Ultra Compact Dwarf galaxies in Abell 1689: a photometric study with the ACS (2004)

Mieske, S., Infante, L., Benitez, N., Coe, D., Blakeslee, J. P., Zekser, K., ...

The properties of Ultra Compact Dwarf (UCD) galaxy candidates in Abell 1689 (z=0.183) are investigated, based on deep high resolution ACS images. A UCD candidate has to be unresolved, have i

Photometric Redshift of X-Ray Sources in the Chandra Deep Field South (2004)

Zheng, W., Mikles, V. J., Mainieri, V., Hasinger, G., Rosati, P., Wolf, C., ...

Based on the photometry of 10 near-UV, optical, and near-infrared bands of the Chandra Deep Field South, we estimate the photometric redshifts for 342 X-ray sources, which constitute ~99% of all the...

Ground state and finite temperature signatures of quantum phase transitions in the half-filled Hubbard model on a honeycomb lattice (2004)

Paiva, Thereza, Scalettar, R. T., Zheng, W., Singh, R. R. P., Oitmaa, J.

We investigate ground state and finite temperature properties of the half-filled Hubbard model on a honeycomb lattice using quantum monte carlo and series expansion techniques. Unlike the square...

Order and disorder in the triangular-lattice t-J-V model at 2/3 electron density (2004)

Zheng, W., Oitmaa, J., Hamer, C. J., Singh, R. R. P.

Motivated by the recent discovery of superconductivity in Na$_x$CoO$_2\cdot y$H$_2$O, we use series expansion methods and cluster mean-field theory to study spontaneous charge order, Neel order,...

L' and M' Photometry of Ultracool Dwarfs (2004)

Golimowski, D. A., Leggett, S. K., Marley, M. S., Fan, X., Geballe, T. R., Knapp, G. R., ...

We have compiled L' and M' photometry of 63 single and binary M, L,and T dwarfs obtained at UKIRT using the MKO filter set. This compilation includes new L' data for 8 L dwarfs and 13 T dwarfs and...

A self-learning system for identifying harmful network information (2004)

Shi, Wei, Zhou, Wanlei, Zheng, W.

Network information identification is a “hot” topic currently. This paper designs a self-learning system using neural network algorithm for identifying the harmful network messages of...

A Study of the Reionization History of Intergalactic Helium with FUSE and VLT (2003)

Zheng, W., Kriss, G. A., Dixon, W. V., Kruk, J. W., Shull, J. M., ...

We obtained high-resolution VLT and FUSE spectra of the quasar HE2347-4342 to study the properties of the intergalactic medium between redshifts z=2.0-2.9. The high-quality optical spectrum allows us...

ACS Observations of a Strongly Lensed Arc in a Field Elliptical (2003)

Blakeslee, J. P., Zekser, K. C., Benitez, N., Franx, M., White, R. L., Ford, H. C., ...

We report the discovery of a strongly lensed arc system around a field elliptical galaxy in Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) images of a parallel field observed during...

A gravitationally lensed quasar with quadruple images separated by 14.62 arcseconds (2003)

Inada, N, Oguri, M, Pindor, B, Hennawi, JF, Chiu, KL, Zheng, W, ...

Gravitational lensing is a powerful tool for the study of the distribution of dark matter in the Universe. The cold-dark-matter model of the formation of large-scale structures ( that is, clusters of...

A Gravitationally Lensed Quasar with Quadruple Images Separated by 14.62 Arcseconds (2003)

Inada, N., Oguri, M., Pindor, B., Hennawi, J. F., Chiu, K., Zheng, W., ...

Gravitational lensing is a powerful tool for the study of the distribution of dark matter in the Universe. The cold-dark-matter model of the formation of large-scale structures predicts the existence...

Observations and Theoretical Implications of the Large Separation Lensed Quasar SDSS J1004+4112 (2003)

Oguri, M., Inada, N., Keeton, C. R., Pindor, B., Hennawi, J. F., Gregg, M. D., ...

We study the recently discovered gravitational lens SDSS J1004+4112, the first quasar lensed by a cluster of galaxies. It consists of four images with a maximum separation of 14.62''. The system has...

The Chandra Deep Field South: Optical Spectroscopy I (2003)

Szokoly, G. P., Bergeron, J., Hasinger, G., Lehmann, I., Kewley, L., Mainieri, V., ...

We present the results of our spectroscopic follow-up program of the X-ray sources detected in the 942 ks exposure of the Chandra Deep Field South (CDFS). 288 possible counterparts were observed at...

Detection of Intergalactic HeII Absorption at Redshift 3.5 (2003)

Zheng, W., Chiu, K., Anderson, S. F., Schneider, D. P., Hogan, C. J., York, D. G., ...

The large number of quasars found in the Sloan Digital Sky Survey has allowed searches for elusive, clear lines of sight towards HeII Ly-alpha absorption, a sensitive probe of the intergalactic...

Discovery of Globular Clusters in the Proto-Spiral NGC2915: Implications for Hierarchical Galaxy Evolution (2003)

Meurer, G. R., Blakeslee, J. P., Sirianni, M., Ford, H. C., Illingworth, G. D., Benitez, N., ...

We have discovered three globular clusters beyond the Holmberg radius in Hubble Space Telescope Advanced Camera for Surveys images of the gas-rich dark matter dominated blue compact dwarf galaxy...

Faint Galaxies in deep ACS observations (2003)

Benitez, N., Ford, H., Bouwens, R., Menanteau, F., Blakeslee, J., Gronwall, C., ...

We present the analysis of the faint galaxy population in the Advanced Camera for Surveys (ACS) Early Release Observation fields VV 29 (UGC 10214) and NGC 4676. Here we attempt to thoroughly consider...

Star Formation at z~6: i-dropouts in the ACS GTO fields (2003)

Bouwens, R. J., Illingworth, G. D., Rosati, P., Lidman, C., Broadhurst, T., Franx, M., ...

Using an i-z dropout criterion, we determine the space density of z~6 galaxies from two deep ACS GTO fields with deep optical-IR imaging. A total of 23 objects are found over 46 arcmin^2, or ~0.5...

The Ionized Gas and Nuclear Environment in NGC 3783 III. Detection of a Decreasing Radial Velocity in an Intrinsic UV Absorber (2003)

Gabel, J. R., Crenshaw, D. M., Kraemer, S. B., Brandt, W. N., George, I. M., Hamann, F. W., ...

We report an intrinsic absorber with decreasing outflow velocity in the Seyfert 1 galaxy NGC 3783. This is the first detection of a change in radial velocity in an outflow associated with a Seyfert...

A Puzzling X-Ray Source Found in the chandra Deep Field South (2003)

Wang, J., Yaqoob, T., Szokoly, G., Gilli, R., Kewley, L., Mainieri, V., ...

In this letter we report the detection of an extremely strong X-ray emission line in the 940ks chandra ACIS-I spectrum of CXO CDFS J033225.3-274219. The source was identified as a Type1 AGN at...

Ferrimagnetism and compensation points in a decorated 3D Ising models (2003)

Oitmaa, J., Zheng, W.

We give a precise numerical solution for decorated Ising models on the simple cubic lattice which show ferromagnetism, compensation points, and reentrant behaviour. The models, consisting of...

Tracing the large scale structure in the Chandra Deep Field South (2003)

Gilli, R., Cimatti, A., Daddi, E., Hasinger, G., Rosati, P., Szokoly, G., ...

We report the discovery of large scale structures of X-ray sources in the 1Msec observation of the Chandra Deep Field South. Two main structures appear as narrow (Delta_z < 0.02) spikes in the source...

HST/ACS Coronagraphic Imaging of the Circumstellar Disk around HD1415659A (2003)

Clampin, M., Krist, J. E., Ardila, D. R., Golimowski, D. A., Hartig, G. F., Ford, H. C., ...

Multicolor coronagraphic images of the circumstellar disk around HD141569A have been obtained with the Hubble Space Telescope (HST) Advanced Camera for Surveys. B, V, and I images show that the...

A closer look at symmetry breaking in the collinear phase of the $J_1-J_2$ Heisenberg Model (2003)

Singh, R. R. P., Zheng, W., Oitmaa, J., Sushkov, O. P., Hamer, C. J.

The large $J_2$ limit of the square-lattice $J_1-J_2$ Heisenberg antiferromagnet is a classic example of order by disorder where quantum fluctuations select a collinear ground state. Here, we use...

Discovery of Two Distant Type Ia Supernovae in the Hubble Deep Field North with the Advanced Camera for Surveys (2003)

Blakeslee, John P., Tsvetanov, Zlatan I., Riess, Adam G., Ford, Holland C., Illingworth, Garth D., Magee, Daniel, ...

We present observations of the first two supernovae discovered with the recently installed Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. The supernovae were found in Wide Field...

A technique for large scale drought monitoring (China National 94.8 Technique Import Project) (2003)

Su, Z., Yang, Y., Zhang, J., Lu, G., Zhou, G., Roerink, G.J., ...

Drought is one of the main natural disasters that man has suffered since the ancient era. In China nation-wide droughts occur year after year, imposing severe threats to the food security and...

A Study of the Reionization History of Intergalactic Helium with FUSE and VLT (2003)

Zheng, W., Kriss, G. A., Dixon, W. V., Kruk, J. W., Shull, J. M., ...

We obtained high-resolution VLT and FUSE spectra of the quasar HE2347-4342 to study the properties of the intergalactic medium between redshifts z=2.0-2.9. The high-quality optical spectrum allows us...

A Study of the Reionization History of Intergalactic Helium with FUSE and VLT (2003)

Zheng, W., Kriss, G. A., Dixon, W. V., Kruk, J. W., Shull, J. M., ...

We obtained high-resolution VLT and FUSE spectra of the quasar HE2347-4342 to study the properties of the intergalactic medium between redshifts z=2.0-2.9. The high-quality optical spectrum allows us...

A technique for large scale drought monitoring (China National 94.8 Technique Import Project) (2003)

Su, Z., Yang, Y., Zhang, J., Lu, G., Zhou, G., Roerink, G.J., ...

Drought is one of the main natural disasters that man has suffered since the ancient era. In China nation-wide droughts occur year after year, imposing severe threats to the food security and...

Parametric quantum spin pump (2003)

Zheng, W, Wu, J, Wang, B, Wang, J, Sun, Q, Guo, H

We investigate a nonadiabatic parametric quantum pump consisting of a nonmagnetic scattering region connected by two ferromagnetic leads. The presence of ferromagnetic leads allows electrons with...

Spectral weight contributions of many-particle bound states and continuum (2002)

Zheng, W., Hamer, C. J., Singh, R. R. P.

Cluster expansion methods are developed for calculating the spectral weight contributions of multiparticle excitations - continuum and bound states - to high orders. A complete 11th order calculation...

Zero Temperature Series Expansions for the Kondo Lattice Model (2002)

Zheng, W., Oitmaa, J.

We present new results for the Kondo lattice model of strongly correlated electrons, in 1-, 2-, and 3-dimensions, obtained from high-order linked-cluster series expansions. Results are given for...

Finite temperature strong-coupling expansions for the Kondo lattice model (2002)

Oitmaa, J., Zheng, W.

Strong-coupling expansions, to order $(t/J)^8$, are derived for the Kondo lattice model of strongly correlated electrons, in 1-, 2- and 3- dimensions at arbitrary temperature. Results are presented...

Extreme Ultraviolet Absorption Lines in LyA Forest Absorbers and the Oxygen Abundance in the Intergalactic Medium (2002)

Telfer, R. C., Kriss, G. A., Zheng, W., Davidsen, A. F., Tytler, D.

We create stacked composite absorption spectra from Hubble Space Telescope Faint Object Spectrograph data from four quasi-stellar objects to search for absorption lines in the extreme ultraviolet...

Two-Hole and Four-Hole Bound States in a t-J Ladder at half-filling (2002)

Zheng, W., Hamer, C. J.

The two-hole excitation spectrum of the t-J ladder at half-filling is studied using linked-cluster series expansion methods. A rich spectrum of bound states emerges, particularly at small $t/J$....

The Radiation-Induced Bystander Effect for Clonogenic Survival (2002)

S. G. Sawant, W. Zheng, K. M. Hopkins, G. Randers-Pehrson, H. B. Lieberman, E. J. Hall

Sawant, S. G., Zheng, W., Hopkins, K. M., Randers-Pehrson, G., Lieberman, H. B. and Hall, E. J. The Radiation-Induced Bystander Effect for Clonogenic Survival. Radiat. Res. 157, 361–364 (2002). It...

The Ionized Gas and Nuclear Environment in NGC 3783. I. Time-Averaged 900 ks Chandra Grating Spectroscopy (2002)

Kaspi, S., Brandt, W. N., George, I. M., Netzer, H., Crenshaw, D. M., Gabel, J. R., ...

We present results from a 900 ks exposure of NGC 3783 with the High-Energy Transmission Grating Spectrometer on board the Chandra X-ray Observatory. The resulting X-ray spectrum has the best...

Sloan Digital Sky Survey: Early data release (2002)

Stoughton, C., Lupton, R. H., Bernardi, M., Blanton, M. R., Burles, S., Castander, F. J., ...

The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of 10 6 galaxies, 100,000...

Construction, operation, and maintenance of rubber dams (2002)

Zhang, XQ, Tam, PWM, Zheng, W

Rubber dams are inflatable and deflatable hydraulic structures. Thousands of rubber dams have been installed worldwide for various purposes: irrigation, water supply, power generation, tidal barrier,...

Chandra Deep Field South: The 1Msec Catalog (2001)

Giacconi, R., Zirm, A., Wang, J., Rosati, P., Nonino, M., Tozzi, P., ...

In this Paper we present the source catalog obtained from a 942 ks exposure of the Chandra Deep Field South (CDFS), using ACIS-I on the Chandra X-ray Observatory. Catalog generation proceeded...

The Spectral Energy Distribution of the Seyfert galaxy Ton S180 (2001)

Turner, T. J., Romano, P., Kraemer, S. B., George, I. M., Yaqoob, T., Crenshaw, D. M., ...

We present spectral results from a multi-satellite, broad-band campaign on the Narrow-line Seyfert 1 galaxy Ton S180 performed at the end of 1999. We discuss the spectral-energy distribution of the...

The Chandra Deep Field South: the 1 Million Second (2001)

Rosati, P., Tozzi, P., Giacconi, R., Gilli, R., Hasinger, G., Kewley, L., ...

We present the main results from our 940 ksec observation of the Chandra Deep Field South (CDFS), using the source catalog described in an accompanying paper (Giacconi et al. 2001). We extend the...

The Rest-Frame Extreme Ultraviolet Spectral Properties of QSOs (2001)

Telfer, R. C., Zheng, W., Kriss, G. A., Davidsen, A. F.

We use a sample of 332 Hubble Space Telescope spectra of 184 QSOs with z > 0.33 to study the typical ultraviolet spectral properties of QSOs, with emphasis on the ionizing continuum. Our sample is...

Far Ultraviolet Spectroscopic Explorer Observations of the Seyfert 1.5 Galaxy NGC 5548 in a Low State (2001)

Brotherton, M. S., Green, R. F., Kriss, G. A., Oegerle, W., Kaiser, M. E., Zheng, W., ...

We present far-ultraviolet spectra of the Seyfert 1.5 galaxy NGC 5548 obtained in 2000 June with the Far Ultraviolet Spectroscopic Explorer (FUSE). Our data span the observed wavelength range...

Resolving the Structure of Ionized Helium in the Intergalactic Medium with the Far Ultraviolet Spectroscopic Explorer (2001)

Kriss, G. A., Shull, J. M., Oegerle, W., Zheng, W., Davidsen, A. F., Songaila, A., ...

The neutral hydrogen and the ionized helium absorption in the spectra of quasars are unique probes of structure in the early universe. We present Far-Ultraviolet Spectroscopic Explorer observations...

Ultraviolet Broad Absorption Features and the Spectral Energy Distribution of the QSO PG 1351+64 (2001)

Zheng, W., Kriss, G. A., Wang, J. X., Brotherton, M., Oegerle, W. R., Blair, W. P., ...

We present a moderate-resolution (~20 km/s) spectrum of the mini broad-absorption-line QSO PG1351+64 between 915-1180 A, obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE). Additional...

Extreme BAL Quasars from the Sloan Digital Sky Survey (2001)

Hall, Patrick B., Gunn, J. E., Knapp, G. R., Narayanan, V. K., Strauss, M. A., Anderson, S. F., ...

The Sloan Digital Sky Survey has discovered a population of broad absorption line quasars with various extreme properties. Many show absorption from metastable states of FeII with varying...

Evidence for an accelerating wind as the broad-line region in NGC 3516 (2001)

Hutchings, J. B., Kriss, G. A., Green, R. F., Brotherton, M., Kaiser, M. E., Koratkar, A. P., ...

Spectroscopic data in wavelengths 900--3000A have been obtained in a low flux state of the nucleus of the Seyfert 1 galaxy NGC 3516. The line profiles show P Cygni characteristics, particularly in O...

A Classic Type 2 QSO (2001)

Norman, C., Hasinger, G., Giacconi, R., Gilli, R., Kewley, L., Nonino, M., ...

In the Chandra Deep Field South 1Msec exposure we have found, at redshift 3.700 +- 0.005, the most distant Type 2 AGN ever detected. It is the source with the hardest X-ray spectrum with redshift...

New Results from the X-ray and Optical Survey of the Chandra Deep Field South: The 300ks Exposure (2001)

Tozzi, P., Rosati, P., Nonino, M., Bergeron, J., Borgani, S., Gilli, R., ...

We present results from 300 ks of X-ray observations of the Chandra Deep Field South. The field of the four combined exposures is now 0.1035 deg^2 and we reach a flux limit of 10^{-16} erg s^{-1}...

The Spectral Energy Distribution of the Seyfert galaxy Ton S180 (2001)

Turner, T. J., Romano, P., Kraemer, S. B., George, I. M., Yaqoob, T., Crenshaw, D. M., ...

We present spectral results from a multi-satellite, broad-band campaign on the Narrow-line Seyfert 1 galaxy Ton S180 performed at the end of 1999. We discuss the spectral-energy distribution of the...

The Spectral Energy Distribution of the Seyfert galaxy Ton S180 (2001)

Turner, T. J., Romano, P., Kraemer, S. B., George, I. M., Yaqoob, T., Crenshaw, D. M., ...

We present spectral results from a multi-satellite, broad-band campaign on the Narrow-line Seyfert 1 galaxy Ton S180 performed at the end of 1999. We discuss the spectral-energy distribution of the...

Chandra Grating Spectroscopy of the Seyfert Galaxy Ton S180 (2000)

Turner, T. J., George, I. M., Yaqoob, T., Kriss, G., Crenshaw, D. M., Kraemer, S., ...

This paper presents results from spectral observations of Ton S180 using Chandra and ASCA. The data confirm the presence of the soft excess but the Chandra LETG spectrum reveals it to be broad and...

A Possible Evolutionary Connection between AGN and Starburst in LINERs (2000)

Lei, S. J., Huang, J. H., Zheng, W., Ji, L., Gu, Q. S.

Our analysis on the two magnitude-limited samples of LINERs suggests a correlation between $L_{\FIR}/L_{\B}$ or f(25\micron)/f(60\micron), and Hubble-type index at $>$99.99% significance level. As...

Extreme Galactic-Winds and Starburst in IR Mergers and IR QSOs (2000)

Lipari, S., Sanders, D., Terlevich, R., Veilleux, S., Diaz, R., Taniguchi, Y., ...

We report -as a part of a long-term study of mergers and IR QSOs- detailed spectroscopic evidences for outflow (OF) and/or Wolf Rayet features in: (i) low velocity OF in the ongoing mergers NGC...

First Results from the X-ray and Optical Survey of the Chandra Deep Field South (2000)

Giacconi, R., Rosati, P., Tozzi, P., Nonino, M., Hasinger, G., Norman, C., ...

We present our first results from 130 ks of X-ray observations obtained with the Advanced CCD Imaging Spectrometer on the Chandra X-ray Observatory. We reach a flux of 2 X 10^(-16) erg s^(-1) cm^(-2)...

Five High-Redshift Quasars Discovered in Commissioning Imaging Data of the Sloan Digital Sky Survey (2000)

Zheng, W., Tsvetanov, Z. I., Schneider, D. P., Fan, X., Becker, R. H., Davis, M., ...

We report the discovery of five quasars with redshifts of 4.67 - 5.27 and z'-band magnitudes of 19.5-20.7 M_B ~ -27. All were originally selected as distant quasar candidates in optical/near-infrared...

FUSE Observations of Intrinsic Absorption in the Seyfert 1 Galaxy Mrk 509 (2000)

Kriss, G. A., Green, R. F., Brotherton, M., Oegerle, W., Sembach, K. R., Davidsen, A. F., ...

We present far-ultraviolet spectra of the Seyfert 1 galaxy Mrk 509 obtained in 1999 November with the Far Ultraviolet Spectroscopic Explorer (FUSE). Our data span the observed wavelength range...

Evidence for an energy scale for quasiparticle dispersion in Bi_2Sr_2CaCu_2O_8 (2000)

Bogdanov, P. V., Lanzara, A., Kellar, S. A., Zhou, X. J., Lu, E. D., Zheng, W., ...

Quasiparticle dispersion in $Bi_{2}Sr_{2}CaCu_{2}O_{8}$ is investigated with improved angular resolution as a function of temperature and doping. Unlike the linear dispersion predicted by the band...

AC response of an atomic tunnel junction (2000)

Zheng, W, Wei, Y, Wang, J, Guo, H

By combining density functional analysis with the solution of a three-dimensional quantum scattering problem, and applying appropriate ac transport theory, we investigated the ac transport response...

The Ultraviolet Peak of the Energy Distribution in 3C~273: Evidence for an Accretion Disk and Hot Corona Around a Massive Black Hole (1999)

Kriss, G. A., Davidsen, A. F., Zheng, W., Lee, G.

We present absolutely calibrated FUV spectra of the quasar 3C~273 covering 900- 1800 A. Our ~3 A resolution spectra were obtained with the Hopkins Ultraviolet Telescope during the Astro-1 mission in...

Stress Corrosion Cracking of Annealed Type 316 Stainless Steel in High-Temperature Water. (1998)

Congleton, J., Zheng, W., Hua, H.

Stress corrosion cracking was observed in two ranges of potential when slow strain rate tests were performed on annealed 316 stainless steel in 5 ppm chloride water from 100 to 300 C under various...

The Effect of Hydrogen on the Fracture of a Commercial Duplex Stainless Steel. (1998)

Zheng, W., Hardie, D.

Effect of hydrogen on the fracture behavior of a duplex stainless steel has been studied by slow tensile straining of specimens thermally-charged with hydrogen in air and uncharged specimens in...

New Wolf-Rayet Galaxies with Detection of WC Stars (1998)

Huang, J. H., Gu, Q. S., Ji, L., Li, W. D., Wei, J. Y., Zheng, W.

We report the discovery of two new Wolf-Rayet (WR) galaxies: Mrk~1039, and F08208$+$2816. Two broad WR bumps at 5808\AA~ and 4650\AA~ indicate the presence of WCE and WNL star population in all two...

STEPS TOWARD DETERMINATION OF THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI. XII. GROUND-BASED MONITORING OF 3C 390.3 (1998)

Dietrich, M., Peterson, B.M., Albrecht, P., Altmann, M., Barth, A.J., Bennie, P.J., ...

Results of a ground-based optical monitoring campaign on 3C 390.3 in 1994-1995 are presented. The broadband fluxes (B, V , R, and I), the spectrophotometric optical continuum flux Fλ(5177 Å),...

Steps toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XII. Ground-based Monitoring of 3C 390.3 (1998)

Dietrich, M, Peterson, B. M, Albrecht, P, Altmann, M, Barth, A. J, Bennie, P. J, ...

Results of a ground-based optical monitoring campaign on 3C 390.3 in 1994-1995 are presented. The broadband fluxes (B, V, R, and I), the spectrophotometric optical continuum flux F lambda (5177 A),...

Far-UV Observations of NGC 4151 during the ORFEUS-SPAS II Mission (1997)

Espey, B. R., Kriss, G. A., Krolik, J. H., Zheng, W., Tsvetanov, Z., Davidsen, A. F.

We observed the Seyfert 1 galaxy NGC 4151 on eleven occasions at 1-2 day intervals using the Berkeley spectrometer during the ORFEUS-SPAS II mission in 1996 November. The mean spectrum covers...

Steps toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. X. Variability of Fairall 9 from Optical Data (1997)

Santos-Lleo, M, Chatzichristou, E, De Oliveira, C. M, Winge, C, Alloin, D, Peterson, B. M, ...

The results of an optical monitoring campaign on the active nucleus in the luminous Seyfert 1 galaxy Fairall 9 are presented. This campaign was undertaken in parallel with ultraviolet spectroscopic...

A Composite HST Spectrum of Quasars (1996)

Zheng, W., Kriss, G. A., Telfer, R. C., Grimes, J. P., Davidsen, A. F.

We construct a composite quasar spectrum from 284 HST FOS spectra of 101 quasars with redshifts z > 0.33. The spectrum covers the wavelengths between 350 and 3000 A in the rest frame. There is a...

HUT Observations of the Lyman Limit in AGN: Implications for Unified Models (1996)

Kriss, G., Krolik, J., Grimes, J., Tsvetanov, Z., Espey, B., Zheng, W., ...

We observed a total of 13 low-redshift AGN with the Hopkins Ultraviolet Telescope (HUT) during the course of the Astro-1 and Astro-2 missions. Of these, 4 show intrinsic Lyman limit absorption---NGC...

Far-Ultraviolet Observations of NGC 3516 using the Hopkins Ultraviolet Telescope (1996)

Kriss, G. A., Espey, B. R., Krolik, J. H., Tsvetanov, Z., Zheng, W., Davidsen, A. F.

We observed the Seyfert 1 galaxy NGC 3516 twice during the flight of Astro-2 using the Hopkins Ultraviolet Telescope in March 1995. Simultaneous X-ray observations were performed with ASCA. Our...

ASCA Observations of the Composite Warm Absorber in NGC 3516 (1996)

Kriss, G. A., Krolik, J. H., Otani, C., Espey, B. R., Turner, T. J., Kii, T., ...

We obtained X-ray spectra of the Seyfert 1 galaxy NGC~3516 in March 1995 using ASCA. Simultaneous far-UV observations were obtained with HUT on the Astro-2 shuttle mission. The ASCA spectrum shows a...

Microdosimetry Computation Code for Internal Sources (1996)

Li, W., Zheng, W.

A microdosimetry computation code named MICRODOSE1 has been developed on the basis of the following described methods: (1) the calculation of f1(z) for charged particles in unit density tissues; (2)...

Truncated eigenvalue equation and long wavelength behavior of lattice gauge theory (1995)

Guo, S. H., Chen, Q. Z., Fang, X., Liu, J., Luo, X. Q., Zheng, W.

We review our new method, which might be the most direct and efficient way for approaching the continuum physics from Hamiltonian lattice gauge theory. It consists of solving the eigenvalue equation...

Interfacial interaction in PP/EPDM polymer blend studied by positron annihilation (1993)

Wang, C., Wang, S., Zheng, W., Qi, Z.

Positron lifetimes in polypropylene/ethylene-propylene-diene monomer blend (PP/EPDM, EPDM volume content = 40%), pure PP and EPDM have been measured in the temperature range of 95-370K. We observed...

Interfacial interaction in PP/EPDM polymer blend studied by positron annihilation (1993)

Wang, C., Wang, S., Zheng, W., Qi, Z.

Positron lifetimes in polypropylene/ethylene-propylene-diene monomer blend (PP/EPDM, EPDM volume content = 40%), pure PP and EPDM have been measured in the temperature range of 95-370K. We observed...

Interfacial interaction in PP/EPDM polymer blend studied by positron annihilation (1993)

Wang, C., Wang, S., Zheng, W., Qi, Z.

Positron lifetimes in polypropylene/ethylene-propylene-diene monomer blend (PP/EPDM, EPDM volume content = 40%), pure PP and EPDM have been measured in the temperature range of 95-370K. We observed...

Genetic transfer of a nonpeptide antagonist binding site to a previously unresponsive angiotensin receptor.

Ji, H, Zheng, W, Zhang, Y, Catt, K J, Sandberg, K

Mutational analysis based on the pharmacological differences between mammalian and amphibian angiotensin II receptors (AT receptors) previously identified 7 aa residues located in transmembrane...

Differentiation of epidemic-associated strains of Listeria monocytogenes by restriction fragment length polymorphism in a gene region essential for growth at low temperatures (4 degrees C).

Zheng, W, Kathariou, S

The growth of Listeria monocytogenes in food stored in the cold has often been implicated in outbreaks of listeriosis. Many subtyping schemes have suggested that epidemic-associated strains belong to...

Host-mediated modification of Sau3AI restriction in Listeria monocytogenes: prevalence in epidemic-associated strains.

Zheng, W, Kathariou, S

Most major food-related outbreaks of listeriosis have been traced to a cluster of genetically related strains of serovar 4b (epidemic clone). In spite of numerous searches, distinct bacteriologic or...

The association of drinking water source and chlorination by-products with cancer incidence among postmenopausal women in Iowa: a prospective cohort study.

Doyle, T J, Zheng, W, Cerhan, J R, Hong, C P, Sellers, T A, Kushi, L H, ...

OBJECTIVES: This study assessed the association of drinking water source and chlorination by-product exposure with cancer incidence. METHODS: A cohort of 28,237 Iowa women reported their drinking...

Hormonal replacement therapy and morbidity and mortality in a prospective study of postmenopausal women.

Folsom, A R, Mink, P J, Sellers, T A, Hong, C P, Zheng, W, Potter, J D

We assessed the association of hormonal replacement therapy with mortality and incidence of multiple diseases in over 40,000 postmenopausal women followed for 6 years as part of the Iowa Women's...

Genetic transfer of a nonpeptide antagonist binding site to a previously unresponsive angiotensin receptor.

Ji, H, Zheng, W, Zhang, Y, Catt, K J, Sandberg, K

Mutational analysis based on the pharmacological differences between mammalian and amphibian angiotensin II receptors (AT receptors) previously identified 7 aa residues located in transmembrane...

Differentiation of epidemic-associated strains of Listeria monocytogenes by restriction fragment length polymorphism in a gene region essential for growth at low temperatures (4 degrees C).

Zheng, W, Kathariou, S

The growth of Listeria monocytogenes in food stored in the cold has often been implicated in outbreaks of listeriosis. Many subtyping schemes have suggested that epidemic-associated strains belong to...

Host-mediated modification of Sau3AI restriction in Listeria monocytogenes: prevalence in epidemic-associated strains.

Zheng, W, Kathariou, S

Most major food-related outbreaks of listeriosis have been traced to a cluster of genetically related strains of serovar 4b (epidemic clone). In spite of numerous searches, distinct bacteriologic or...

The association of drinking water source and chlorination by-products with cancer incidence among postmenopausal women in Iowa: a prospective cohort study.

Doyle, T J, Zheng, W, Cerhan, J R, Hong, C P, Sellers, T A, Kushi, L H, ...

OBJECTIVES: This study assessed the association of drinking water source and chlorination by-product exposure with cancer incidence. METHODS: A cohort of 28,237 Iowa women reported their drinking...

Hormonal replacement therapy and morbidity and mortality in a prospective study of postmenopausal women.

Folsom, A R, Mink, P J, Sellers, T A, Hong, C P, Zheng, W, Potter, J D

We assessed the association of hormonal replacement therapy with mortality and incidence of multiple diseases in over 40,000 postmenopausal women followed for 6 years as part of the Iowa Women's...

Follicle-stimulating hormone receptor is expressed in human ovarian surface epithelium and fallopian tube.

Zheng, W., Magid, M. S., Kramer, E. E., Chen, Y. T.

The cellular expression of pituitary gonadotropin receptors in gonadal tissues is poorly defined because of the lack of suitable reagents. In this study, we developed in situ hybridization and...

Alcohol, tobacco and breast cancer - collaborative reanalysis of individual data from 53 epidemiological studies, including 58515 women with breast cancer and 95067 women without the disease

Beral, V, Hamajima, N, Hirose, K, Rohan, T, Calle, EE, Heath, CW, ...

Alcohol and tobacco consumption are closely correlated and published results on their association with breast cancer have not always allowed adequately for confounding between these exposures. Over...

Interaction of biphenylimidazole and imidazoleacrylic acid nonpeptide antagonists with valine 108 in TM III of the AT1 angiotensin receptor.

Nirula, V., Zheng, W., Sothinathan, R., Sandberg, K.

Interspecies amino acid exchange, based on pharmacological differences between mammalian AT1 and amphibian xAT angiotensin II receptors, previously demonstrated that Val108 in transmembrane III...

Occupation and lung cancer in Shanghai: a case-control study.

Levin, L I, Zheng, W, Blot, W J, Gao, Y T, Fraumeni, J F

Occupation was evaluated as a potential risk factor for lung cancer as part of a large population based case-control study conducted in the ten urban districts of Shanghai. A total of 733 newly...

Declining incidence is greater for esophageal than gastric cancer in Shanghai, People's Republic of China.

Zheng, W., Jin, F., Devesa, S. S., Blot, W. J., Fraumeni, J. F., Gao, Y. T.

Temporal trends in the incidence of esophageal and gastric cancers during 1972 to 1989 were addressed in urban Shanghai, the location of China's longest standing cancer registry. Over the 18 year...

Lung cancer and prior tuberculosis infection in Shanghai.

Zheng, W., Blot, W. J., Liao, M. L., Wang, Z. X., Levin, L. I., Zhao, J. J., ...

In a population-based case-control study of lung cancer in Shanghai involving interviews during 1984-86 with 1,405 cancer patients and 1,495 controls, a significant 50% elevation in the risk of lung...

Diagnostic X-ray and ultrasound exposure and risk of childhood cancer.

Shu, X. O., Jin, F., Linet, M. S., Zheng, W., Clemens, J., Mills, J., ...

In a population-based case-control study of 642 childhood cancer cases and the same number of matched controls in Shanghai, China, we evaluated the relationship between diagnostic X-ray...

Animal food intake and cooking methods in relation to endometrial cancer risk in Shanghai

Xu, W-H, Dai, Q, Xiang, Y-B, Zhao, G-M, Zheng, W, Gao, Y-T, ...

We evaluated animal food intake and cooking methods in relation to endometrial cancer risk in a population-based case–control study in Shanghai, China. A validated food frequency questionnaire was...

Diagnostic potential of near-infrared Raman spectroscopy in the stomach: differentiating dysplasia from normal tissue

Teh, S K, Zheng, W, Ho, K Y, Teh, M, Yeoh, K G, Huang, Z

Raman spectroscopy is a molecular vibrational spectroscopic technique that is capable of optically probing the biomolecular changes associated with diseased transformation. The purpose of this study...

Progesterone receptor variation and risk of ovarian cancer is limited to the invasive endometrioid subtype: results from the ovarian cancer association consortium pooled analysis

Pearce, C L, Wu, A H, Gayther, S A, Bale, A E, Beck, P A, Beesley, J, ...

There is evidence that progesterone plays a role in the aetiology of invasive epithelial ovarian cancer. Therefore, genes involved in pathways that regulate progesterone may be candidates for...

A case–control study in Shanghai of fruit and vegetable intake and endometrial cancer

Tao, M H, Xu, W H, Zheng, W, Gao, Y T, Ruan, Z X, Cheng, J R, ...

In a population-based case–control study of 832 incident endometrial cancer cases and 846 frequency-matched controls among Chinese women in Shanghai, using a validated food-frequency questionnaire,...

Lifetime physical activity and breast cancer risk in the Shanghai Breast Cancer Study

Matthews, C E, Shu, X-O, Jin, F, Dai, Q, Hebert, J R, Ruan, Z-X, ...

Overall physical activity in adolescence and adulthood, and changes in activity over the lifespan were analysed by in-person interviews among 1459 women newly diagnosed with breast cancer and 1556...

Population-based case–control study of soyfood intake and breast cancer risk in Shanghai

Dai, Q, Shu, X-O, Jin, F, Potter, J D, Kushi, L H, Teas, J, ...

We evaluated the association of soyfood intake and breast cancer risk in a population-based case–control study among Chinese women in Shanghai. Included in the study were 1459 cases and 1556...

Weight at birth and adolescence and premenopausal breast cancer risk in a low-risk population

Sanderson, M, Shu, X O, Jin, F, Dai, Q, Ruan, Z, Gao, Y-T, ...

We assessed breast cancer risk in relation to weight at birth and adolescence. In-person interviews were completed with the biological mothers of women aged 45 years and younger who participated in...