Linear gas stoppers are widely used to convert high-energy, rare-isotope beams and reaction products into low-energy beams with small transverse emittance and energy spread. Stopping of the high-energy ions is achieved through interaction with a buffer gas, typically helium, generating large quantities of He+/e− pairs. The Advanced Cryogenic Gas Stopper (ACGS) was designed for fast, efficient stopping and extraction of high-intensity, rare-isotope beams. As part of the design process, a comprehensive particle-in-cell code was developed to optimize the transport and extraction of rare isotopes from the ACGS in the presence of space charge, including He+/e− dynamics, buffer gas interactions including gas flow, radio-frequency carpets, and ion extraction through a nozzle or orifice. Details of the simulations are presented together with comparison to experiment when available.

VL - 496 UR - https://www.sciencedirect.com/science/article/pii/S0168583X21001117 ER - TY - JOUR T1 - Synthesizing social and environmental sensing to monitor the impact of large-scale infrastructure development JF - Environmental Science & Policy Y1 - 2021 A1 - Yingjie Li A1 - Yuqian Zhang A1 - Leigh Anne Tiffany A1 - Ruishan Chen A1 - Meng Cai A1 - Jianguo Liu KW - Belt and road initiative KW - Integrated analysis KW - Large-scale infrastructure KW - Remote sensing KW - Social sensing AB -The booming development of large-scale infrastructure projects (LSIPs) facilitated by China’s Belt and Road Initiative (BRI) has drawn global concern regarding the scale, pace, and potential impact. Studies have largely focused on the geopolitical impact (i.e., politics and international relations) but less is known about social and environmental impact. This is in large part because consistent, high-resolution, cross-boundary social and environmental data at large scales are rather limited. To address the knowledge gap, this research developed a novel Socio-Environmental Sensing (SES) approach by synthesizing remote sensing imagery and geotagged Twitter data to map the socio-environmental impact of LSIPs. We demonstrated the applicability of this approach using two BRI flagship projects, namely, the Mombasa-Nairobi Standard Gauge Railway (SGR) in Kenya and the China-Pakistan Economic Corridor (CPEC) in Pakistan. Our analysis shows that both projects have led to a substantial loss of natural land (e.g., 3.7 % loss of vegetation in Kenya, and 23.3 % reduction of the glacier in Pakistan) but gains in artificial land (e.g., 4.2 % increase in cropland in Kenya, and 34.6 % expansion of built-up land in Pakistan). In addition, the BRI-LSIPs have largely improved local economic development, because nighttime light imagery revealed that regions near the BRI-LSIP sites became much brighter than other regions. Regarding the social aspect, we found that public sentiment toward the projects was largely positive and improved over time, which contradicts the prevalent pessimism to BRI-LSIPs by critics. Nevertheless, sentiment also presented strong spatial heterogeneity – regions around the BRI transportation hubs (usually large cities) most showed more positive sentiment than other regions. By spatially joining the georeferenced sentiment scores with environmental indicators from remote sensing, we further found that positive sentiment improved more in more developed regions, but only changed slightly in other regions. This study provides a novel approach to assess the socio-environmental impact of large-scale projects, and the findings would be useful for informing the implementation of future BRI projects across the globe.

VL - 124 UR - https://www.sciencedirect.com/science/article/pii/S1462901121002057 ER - TY - JOUR T1 - Global variations of Earth's 520- and 560-km discontinuities JF - Earth and Planetary Science Letters Y1 - 2020 A1 - Dongdong Tian A1 - Mingda Lv A1 - S. Shawn Wei A1 - Susannah M. Dorfman A1 - Peter M. Shearer KW - 520-km discontinuity KW - 560-km discontinuity KW - mantle phase transformations KW - mantle transition zone KW - oceanic crust recycling KW - SS precursors AB -We investigate seismic discontinuities in the mantle transition zone (MTZ) by analyzing SS precursors recorded at global seismic stations. Our observations confirm the global existence of the 520-km discontinuity. Although substantial regional depth variations in the 520-km discontinuity are generally correlated with temperature in the mid-MTZ, they cannot be fully explained by the Clapeyron slope of the wadsleyite-ringwoodite phase transition, suggesting both thermal and compositional heterogeneities in the MTZ. A second discontinuity at âŒ560-km depth, previously interpreted as splitting of the 520-km discontinuity, is most commonly detected in cold subduction zones and hot mantle regions. The depth separation between the 520- and 560-km discontinuities varies from âŒ80 km in cold regions to âŒ40 km in hot areas. The exsolution of calcium-perovskite (Ca-pv) from majorite garnet has been proposed to explain the velocity and density changes across the 560-km discontinuity. However, the gradual exsolution of perovskite and partitioning of Ca and Al between perovskite and garnet appear inconsistent with the relatively âsharpâ discontinuity in seismic observations and thus need to be revisited in the future. Nevertheless, because the only known transition in major minerals at this depth in the MTZ is the formation of Ca-pv, the existence of the 560-km discontinuity may imply localized high calcium concentrations in the mid-MTZ possibly related to the recycling of oceanic crust.

VL - 552 UR - http://www.sciencedirect.com/science/article/pii/S0012821X20305446 ER - TY - JOUR T1 - Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle JF - Science Y1 - 2020 A1 - Wei, Songqiao Shawn A1 - Shearer, Peter M. A1 - Lithgow-Bertelloni, Carolina A1 - Stixrude, Lars A1 - Tian, Dongdong AB -Volcanic island and seamount chains form from deep-seated plumes of hot material upwelling through the mantle. The most famous of these is the Hawaiian-Emperor seamount chain. However, a large volcanic structure associated with a plume head that should precede the chain has long been missing. Wei et al. finally identified the likely location of this structure in the mantle under eastern Russia. The structure was likely subducted 20 million to 30 million years ago, and the location helps constrain several geodynamic processes.Science, this issue p. 983The Hawaiian-Emperor seamount chain that includes the Hawaiian volcanoes was created by the Hawaiian mantle plume. Although the mantle plume hypothesis predicts an oceanic plateau produced by massive decompression melting during the initiation stage of the Hawaiian hot spot, the fate of this plateau is unclear. We discovered a megameter-scale portion of thickened oceanic crust in the uppermost lower mantle west of the Sea of Okhotsk by stacking seismic waveforms of SS precursors. We propose that this thick crust represents a major part of the oceanic plateau that was created by the Hawaiian plume head 100 million years ago and subducted 20 million to 30 million years ago. Our discovery provides temporal and spatial clues of the early history of the Hawaiian plume for future plate reconstructions.

VL - 370 UR - https://science.sciencemag.org/content/370/6519/983 ER - TY - JOUR T1 - Determining the rp-Process Flow through 56Ni: Resonances in 57Cu(p,g)58Zn Indentified with GRETINA JF - PHYSICAL REVIEW LETTERS Y1 - 2014 A1 - C. Langer A1 - F. Montes A1 - A. Aprahamian A1 - D.W. Bardayan A1 - D. Bazin A1 - B. A. Brown A1 - J. Browne A1 - H. Crawford A1 - R. Cyburt A1 - C. Domingo-Pardo A1 - A. Gade A1 - S. George A1 - P. Hosmer A1 - L. Keek A1 - A. Kontos A1 - I.Y. Lee A1 - A. Lemasson A1 - E. Lunderberg A1 - Y. Maeda A1 - M. Matos A1 - Z. Meisel A1 - S. Noji A1 - F.M. Nunes A1 - A. Nystrom A1 - G. Perdikakis A1 - J. Pereira A1 - S.J. Quinn A1 - F. Recchia A1 - H. Schatz A1 - M. Scott A1 - K. Siegl A1 - A. Simon A1 - M. Smith A1 - A. Spyrou A1 - J. Stevens A1 - S.R. Stroberg A1 - D. Weisshaar A1 - J. Wheeler A1 - K. Wimmer A1 - R.G.T. Zegers VL - 113 UR - http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.032502 ER - TY - JOUR T1 - Gill bacteria enable a novel digestive strategy in a wood-feeding mollusk JF - PNAS Y1 - 2014 A1 - Roberta M O'Connor A1 - Jennifer M Fung A1 - Koty H Sharp A1 - Jack S Benner A1 - Colleen McClung A1 - Shelley Cushing A1 - Elizabeth R Lamkin A1 - Alexey I Fomenkov A1 - Bernard Henrissat A1 - Yuri Y Londer A1 - Matthew B Scholz A1 - Janos Posfai A1 - Stephanie Malfatti A1 - Susannah G Tringe A1 - Tanja Woyke A1 - Rex R Malmstrom A1 - Devin Coleman-Derr A1 - Marvin A Altamia A1 - Sandra Dedrick A1 - Stefan T Kaluziak A1 - Margo G Haywood A1 - Daniel L Distel VL - 111 UR - http://www.pnas.org/content/111/47/E5096.full IS - 47 ER - TY - JOUR T1 - High-precision B(E2) Measurements of Semi-Magic 58,60,62,64Ni by Coulomb Excitation JF - PHYSICAL REVIEW C Y1 - 2014 A1 - J.M. Allmond A1 - B. A. Brown A1 - A.E. Stuchbery A1 - A. Galindo-Uribarri A1 - E. Padilla-Rodal A1 - D.C. Radford A1 - J.C. Batchelder A1 - M.E. Howard A1 - J.F. Liang A1 - B. Manning A1 - R.L. Varner A1 - C.H. Yu VL - 90 UR - http://journals.aps.org/prc/abstract/10.1103/PhysRevC.90.034309 ER - TY - JOUR T1 - High-resolution two-proton stripping to 2p-1h 7/2− states via the 59Co(3He,nγ)61Cu reaction JF - THE EUROPEAN PHYSICAL JOURNAL A Y1 - 2014 A1 - P. Papka A1 - J.F. Sharpey-Schafer A1 - B. A. Brown A1 - T.S. Dinoko A1 - E.A.M.A Khaleel A1 - E.A. Lawrie A1 - J.J. Lawrie A1 - K.C.W. Li A1 - S.N.T. Majola A1 - W.A. Richter A1 - O. Shirinda A1 - M.A. Stankiewicz A1 - P. Vymers A1 - M. Wiedeking VL - 50 UR - https://people.nscl.msu.edu/~brown/brown-all-papers/541-2014-epja50.158.pdf ER - TY - JOUR T1 - Large Low-Energy M1 Strength for 56,57Fe Within the Nuclear Shell Model JF - PHYSICAL REVIEW LETTERS Y1 - 2014 A1 - B. A. Brown A1 - R.C. Larsen VL - 113 UR - http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.252502 ER - TY - JOUR T1 - Numerical Investigations of Shock Wave Interactions with a Supersonic Turbulent Boundary Layer JF - Physics of Fluids Y1 - 2014 A1 - A. Jammalamadaka A1 - Li, Z. A1 - Jaberi, F.A. VL - 26 UR - http://scitation.aip.org/content/aip/journal/pof2/26/5/10.1063/1.4873495 IS - 5 ER - TY - JOUR T1 - Shell and Shape Evolution at N=28: The 40Mg Ground State JF - PHYSICAL REVIEW C Y1 - 2014 A1 - H.L. Crawford A1 - P. Fallon A1 - A.O. Macchiavelli A1 - R.M. Clark A1 - B. A. Brown A1 - J.A. Tostevin A1 - D. Bazin A1 - N. Aoi A1 - P. Doornenbal A1 - M. Matsushita A1 - H. Scheit A1 - D. Steppenbeck A1 - S. Takeuchi A1 - H. Baba A1 - C.M. Campbell A1 - M. Cromaz A1 - E. Ideguchi A1 - N. Kobayashi A1 - Y. Kondo A1 - G. Lee A1 - I.Y. Lee A1 - J. Lee A1 - K. Li A1 - S. Michimasa A1 - T. Motobayashi A1 - T. Nakamura A1 - S. Ota A1 - S. Paschalis A1 - M. Petri A1 - T. Sako A1 - H. Sakurai A1 - S. Shimoura A1 - M. Takechi A1 - Y. Togano A1 - H. Wang A1 - K. Yoneda VL - 80 UR - http://journals.aps.org/prc/abstract/10.1103/PhysRevC.89.041303 ER - TY - JOUR T1 - Spatially-Explicit Integrated Uncertainty and Sensitivity Analysis of Criteria Weights in Multicriteria Land Suitability Evaluation JF - Environmental Modelling & Software Y1 - 2014 A1 - Ligmann-Zielinskaa, Arika A1 - Jankowskib, Piotr VL - 57 UR - http://www.geo.msu.edu/~stsa/pubs/EMS2014_reprint.pdf ER - TY - JOUR T1 - Two-Phase Filtered Mass Density Function for LES of Turbulent Reacting Flows JF - Journal of Fluid Mechanics Y1 - 2014 A1 - Banaeizadeh, A. A1 - Jaberi, F.A. A1 - Li, Z. VL - 760 UR - http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9402098&fileId=S0022112014005734 ER - TY - JOUR T1 - WRF Model Sensitivity to Land Surface Model and Cumulus Parameterization under Short-Term Climate Extremes over the Southern Great Plains of the United States JF - Journal of Climate Y1 - 2014 A1 - Pei, Lisi A1 - Moore, Nathan A1 - Zhong, Shiyuan A1 - Luo, Lifeng A1 - Hyndman, David W A1 - Heilman, Warren E A1 - Gao, Zhiqiu VL - 27 IS - 20 ER - TY - CONF T1 - Gadget Avalanche: A Technology Literacy Course for Novice Adults T2 - Proceedings of the 2013 Conference of the American Society for Engineering Education Y1 - 2013 A1 - Luchini-Colbry, Kathleen A1 - Dirk Colbry JF - Proceedings of the 2013 Conference of the American Society for Engineering Education CY - Atlanta, GA UR - http://www.asee.org/file_server/papers/attachment/file/0003/4344/ASEE2013-Gadget-FINAL.pdf ER - TY - JOUR T1 - The nature of the H₂-emitting gas in the Crab nebula JF - \mnras Y1 - 2013 A1 - Richardson, C. T. A1 - Baldwin, J. A. A1 - Ferland, G. J. A1 - Loh, E. D. A1 - Kuehn, C. A. A1 - Fabian, A. C. A1 - Salomé, P. KW - ISM: molecules KW - ISM: supernova remnants KW - supernovae: individual: Crab nebula VL - 430 ER - TY - CONF T1 - STEM inSight: Developing a Research Skills Course for First- and Second-Year Students T2 - Proceedings of the 2013 Conference of the American Society for Engineering Education Y1 - 2013 A1 - Dirk Colbry A1 - Luchini-Colbry, Kathleen JF - Proceedings of the 2013 Conference of the American Society for Engineering Education CY - Atlanta, GA UR - http://www.asee.org/file_server/papers/attachment/file/0003/3803/6188.pdf ER - TY - JOUR T1 - Subgrid-Scale Models for Large-Eddy Simulations of Shock-Boundary Layer Interactions, JF - AIAA Journal Y1 - 2013 A1 - A. Jammalamadaka A1 - Li, Z. A1 - Jaberi, F.A. VL - Vol. 5 IS - No. 5 ER - TY - JOUR T1 - Aggregation of α-synuclein is kinetically controlled by intramolecular diffusion JF - Proceedings of the National Academy of Sciences Y1 - 2012 A1 - B. Ahmad A1 - L.J. Lapidus A1 - Y. Chen VL - 7 IS - 109 ER - TY - JOUR T1 - A Census of Star-Forming Galaxies in the z~9-10 Universe based on HST+Spitzer Observations Over 19 CLASH clusters: Three Candidate z~9-10 Galaxies and Improved Constraints on the Star Formation Rate Density at z~9.2 JF - Astrophysical Journal Y1 - 2012 A1 - Bouwens, R, A1 - Bradley, L A1 - Zitrin, A. A1 - Coe, D. A1 - Franx, M. A1 - Zheng, W A1 - Smit, R A1 - Host, O. A1 - Postman, M. A1 - Moustakas, L A1 - Labbe, I A1 - Carrasco, M. A1 - Molino, A. A1 - Donahue, M A1 - Kelson, D. D A1 - Meneghetti, M A1 - Jha, S. A1 - Benitez, N A1 - Lemze, D A1 - Umetsu, K A1 - Broadhurst, T. A1 - Moustakas, J. A1 - Rosati, P. A1 - Bartelmann, M A1 - Ford, H A1 - Graves, G. A1 - Grillo, C. A1 - Infante, L A1 - Jiminez-Teja, Y A1 - Jouvel, S A1 - Lahav, O. A1 - Maoz, D A1 - Medezinski, E A1 - Melchior, P A1 - Merten, J A1 - Nonino, M. A1 - Ogaz, S. A1 - Seitz, S. KW - Astrophysics - Cosmology and Extragalactic Astrophysics ER - TY - JOUR T1 - CLASH: Discovery of a Bright z ~= 6.2 Dwarf Galaxy Quadruply Lensed by MACS J0329.6-0211 JF - The Astrophysical Journal Letters Y1 - 2012 A1 - Zitrin, A. A1 - Moustakas, J. A1 - Bradley, L A1 - Coe, D. A1 - Moustakas, L. A. A1 - Postman, M. A1 - Shu, X A1 - Zheng, W A1 - Benítez, N. A1 - Bouwens, R. A1 - Broadhurst, T. A1 - Ford, H A1 - Host, O. A1 - Jouvel, S A1 - Koekemoer, A. A1 - Meneghetti, M A1 - Rosati, P. A1 - Donahue, M A1 - Grillo, C. A1 - Kelson, D. A1 - Lemze, D A1 - Medezinski, E A1 - Molino, A. A1 - Nonino, M. A1 - Ogaz, S. KW - dark matter KW - galaxies: clusters: general KW - galaxies: clusters: individual: MACS J0329.6-0211 KW - Galaxies: High-Redshift KW - gravitational lensing: strong VL - 747 IS - 1 ER - TY - JOUR T1 - CLASH: Mass Distribution in and around MACS J1206.2-0847 from a Full Cluster Lensing Analysis JF - The Astrophysical Journal Y1 - 2012 A1 - Umetsu, Keiichi A1 - Medezinski, Elinor A1 - Nonino, Mario A1 - Merten, Julian A1 - Zitrin, Adi A1 - Molino, Alberto A1 - Grillo, Claudio A1 - Carrasco, Mauricio A1 - Donahue, Megan A1 - Mahdavi, Andisheh A1 - Coe, Dan A1 - Postman, Marc A1 - Koekemoer, Anton A1 - Czakon, Nicole A1 - Sayers, Jack A1 - Mroczkowski, Tony A1 - Golwala, Sunil A1 - Koch, Patrick M A1 - Lin, Kai-Yang A1 - Molnar, Sandor M A1 - Rosati, Piero A1 - Balestra, Italo A1 - Mercurio, Amata A1 - Scodeggio, Marco A1 - Biviano, Andrea A1 - Anguita, Timo A1 - Infante, Leopoldo A1 - Seidel, Gregor A1 - Sendra, Irene A1 - Jouvel, Stephanie A1 - Host, Ole A1 - Lemze, Doron A1 - Broadhurst, Tom A1 - Meneghetti, Massimo A1 - Moustakas, Leonidas A1 - Bartelmann, Matthias A1 - Benítez, Narciso A1 - Bouwens, Rychard A1 - Bradley, Larry A1 - Ford, Holland A1 - Jiménez-Teja, Yolanda A1 - Kelson, Daniel A1 - Lahav, Ofer A1 - Melchior, Peter A1 - Moustakas, John A1 - Ogaz, Sara A1 - Seitz, Stella A1 - Zheng, Wei KW - cosmology: observations KW - dark matter KW - galaxies: clusters: individual: MACS J1206.2-0847 KW - gravitational lensing: strong KW - gravitational lensing: weak VL - 755 IS - 1 ER - TY - JOUR T1 - CLASH: New Multiple Images Constraining the Inner Mass Profile of MACS J1206.2-0847 JF - The Astrophysical Journal Y1 - 2012 A1 - Zitrin, A. A1 - Rosati, P. A1 - Nonino, M. A1 - Grillo, C. A1 - Postman, M. A1 - Coe, D. A1 - Seitz, S. A1 - Eichner, T A1 - Broadhurst, T. A1 - Jouvel, S A1 - Balestra, I. A1 - Mercurio, A A1 - Scodeggio, M A1 - Benítez, N. A1 - Bradley, L A1 - Ford, H A1 - Host, O. A1 - Jimenez-Teja, Y A1 - Koekemoer, A. A1 - Zheng, W A1 - Bartelmann, M A1 - Bouwens, R. A1 - Czoske, O A1 - Donahue, M A1 - Graur, O A1 - Graves, G. A1 - Infante, L A1 - Jha, S. A1 - Kelson, D. A1 - Lahav, O. A1 - Lazkoz, R A1 - Lemze, D A1 - Lombardi, M. A1 - Maoz, D A1 - McCully, C. A1 - Medezinski, E A1 - Melchior, P A1 - Meneghetti, M A1 - Merten, J A1 - Molino, A. A1 - Moustakas, L. A. A1 - Ogaz, S. A1 - Patel, B. A1 - Regoes, E. A1 - Riess, A. A1 - Rodney, S A1 - Umetsu, K A1 - Van der Wel, A. KW - dark matter KW - galaxies: clusters: general KW - galaxies: clusters: individual: MACS J1206.2–0847 KW - Galaxies: High-Redshift KW - gravitational lensing: strong VL - 749 IS - 2 ER - TY - JOUR T1 - CLASH: Precise New Constraints on the Mass Profile Galaxy Cluster A2261 JF - The Astrophysical Journal Y1 - 2012 A1 - Coe, Dan A1 - Umetsu, Keiichi A1 - Zitrin, Adi A1 - Donahue, Megan A1 - Medezinski, Elinor A1 - Postman, Marc A1 - Carrasco, Mauricio A1 - Anguita, Timo A1 - Geller, Margaret J A1 - Rines, Kenneth J. A1 - Diaferio, Antonaldo A1 - Kurtz, Michael J A1 - Bradley, Larry A1 - Koekemoer, Anton A1 - Zheng, Wei A1 - Nonino, Mario A1 - Molino, Alberto A1 - Mahdavi, Andisheh A1 - Lemze, Doron A1 - Infante, Leopoldo A1 - Ogaz, Sara A1 - Melchior, Peter A1 - Host, Ole A1 - Ford, Holland A1 - Grillo, Claudio A1 - Rosati, Piero A1 - Jiménez-Teja, Yolanda A1 - Moustakas, John A1 - Ascaso, Begoña A1 - Lahav, Ofer; A1 - Bartelmann, Matthias A1 - Benítez, Narciso A1 - Bouwens, Rychard A1 - Graur, Or A1 - Graves, Genevieve A1 - Jha, Saurab A1 - Jouvel, Stephanie A1 - Kelson, Daniel A1 - Moustakas, Leonidas A1 - Maoz, Dan A1 - Meneghetti, Massimo A1 - Merten, Julian A1 - Riess, Adam A1 - Rodney, Steve A1 - Seitz, Stella VL - 757 IS - 1 ER - TY - JOUR T1 - Curcumin Prevents Aggregation in α-Synuclein by Increasing Reconfiguration Rate JF - Journal of Biological Chemistry Y1 - 2012 A1 - B. Ahmad A1 - L.J. Lapidus VL - 12 IS - 287 ER - TY - CONF T1 - CyberGreen: Hands-On Engineering Research in Sustainability and Supercomputing” T2 - ASEE North Central Section 2012 Conference Y1 - 2012 A1 - Dirk Colbry A1 - Luchini-Colbry, Katy JF - ASEE North Central Section 2012 Conference CY - Ada, Ohio ER - TY - JOUR T1 - Evaluating DEM source and resolution uncertainties in the Soil and Water Assessment Tool JF - Stochastic Environmental Research & Risk Assessment Y1 - 2012 A1 - Lin, Shengpan A1 - C. Jing A1 - N.A. Coles A1 - V. Chaplot A1 - Moore, Nathan A1 - Wu, Jiaping VL - 27 IS - 1 ER - TY - JOUR T1 - Evaluation of estimating daily maximum and minimum air temperature with MODIS data in east Africa JF - Journal of Applied Earth Observations and Geoinformation Y1 - 2012 A1 - Lin, Shengpan A1 - Wu, Jiaping A1 - Moore, Nathan A1 - DeVisser, Mark A1 - Messina, Joseph VL - 14 IS - 1 ER - TY - JOUR T1 - A magnified young galaxy from about 500 million years after the Big Bang JF - Nature Y1 - 2012 A1 - Zheng, Wei A1 - Postman, Marc A1 - Zitrin, Adi A1 - Moustakas, John A1 - Shu, Xinwen A1 - Jouvel, Stephanie A1 - Høst, Ole A1 - Molino, Alberto A1 - Bradley, Larry A1 - Coe, Dan A1 - Moustakas, Leonidas A A1 - Carrasco, Mauricio A1 - Ford, Holland A1 - Benítez, Narciso A1 - Lauer, Tod R A1 - Seitz, Stella; B A1 - Bouwens, Rychard A1 - Koekemoer, Anton A1 - Medezinski, Elinor A1 - Bartelmann, Matthias A1 - Broadhurst, Tom A1 - Donahue, Megan A1 - Grillo, Claudio A1 - Infante, Leopoldo A1 - Jha, Saurabh W A1 - Kelson, Daniel D. A1 - Lahav, Ofer A1 - Lemze, Doron A1 - Melchior, Peter A1 - Meneghetti, Massimo A1 - Merten, Julian A1 - Nonino, Mario A1 - Ogaz, Sara A1 - Rosati, Piero A1 - Umetsu, Keiichi A1 - van der Wel, Arjen VL - 489 IS - 7416 ER - TY - JOUR T1 - Mass Measurements of the Neutron-Deficient 41Ti, 45Cr, 49Fe, and 53Ni Nuclides: ￼First Test of the Isobaric Multiplet Mass Equation in fp-Shell Nuclei JF - PHYSICAL REVIEW LETTERS Y1 - 2012 A1 - Y.H. Zhang A1 - H.S. Xu A1 - Yu. A. Litvinov A1 - X.L. Tu A1 - X.L. Yan A1 - S. Typel A1 - K. Blaum A1 - M. Wang A1 - X.H. Zhou A1 - Y. Sun A1 - B. A. Brown A1 - Y.J. Yuan A1 - J.W. Xia A1 - J.C. Yang A1 - G. Audi A1 - X.C. Chen A1 - G.B. Jia A1 - Z.G. Hu A1 - X.W. Ma A1 - R.S. Mao A1 - B. Mei A1 - P. Shuai A1 - Z.Y. Sun A1 - S.T. Wang A1 - G.Q. Xiao A1 - X. Xu A1 - T. Yamaguchi A1 - Y. Yamaguchi A1 - Y.D. Zang A1 - H.W. Zhao A1 - T.C. Zhao A1 - W. Zhang A1 - W.L. Zhan VL - 109 UR - http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.109.102501 ER - TY - JOUR T1 - Physics of bandgap formation in Cu–Sb–Se based novel thermoelectrics: the role of Sb valency and Cu d levels JF - IOP Science Y1 - 2012 A1 - Do, Dat A1 - Ozolins,Vidvuds A1 - S. D. Mahanti A1 - Lee,Mal-Soon A1 - Zhang,Yongsheng A1 - C Wolverton VL - 24 UR - http://iopscience.iop.org.proxy1.cl.msu.edu/0953-8984/24/41/415502 IS - 41 ER - TY - JOUR T1 - The Comprehensive Phytopathogen Genomics Resource: An electronic resource for data-mining plant pathogen genomes JF - Database, doi: 10.1093/database/bar053. Y1 - 2011 A1 - Hamilton, J. P. A1 - Neeno-Eckwall, E. A1 - Adhikari, B. A1 - Perna, N. A1 - Tisserat, N. A1 - Leach, J.E. A1 - Lévesque, C. A. A1 - C. R. Buell ER - TY - JOUR T1 - East African Food Security as Influenced by Future Climate Change and Land Use Change at Local to Regional Scales JF - Climatic Change Y1 - 2011 A1 - Moore, Nathan A1 - Alagarswamy, Gopal A1 - Pijanowski, Bryan A1 - Thornton, Phil A1 - Lofgren, Brent A1 - Olson, Jennifer A1 - Yanda, Pius A1 - Qi, Jiaguo VL - 107 ER - TY - JOUR T1 - Molecular Dynamics Study of Thermal Transport in GaAs-SAM-GaAs Junctions with Ab-initio Characterization of Thiol-GaAs Bonds JF - J. of App. Phys. Y1 - 2011 A1 - Tengfei Luo A1 - John R. Lloyd VL - 109 ER - TY - JOUR T1 - Molecular dynamics study of thermal transport in GaAs-self-assembly monolayer-GaAs junctions with ab initio characterization of thiol-GaAs bonds JF - J. of App. Phys. Y1 - 2011 A1 - Tengfei Luo A1 - John R. Lloyd VL - 109 ER - TY - JOUR T1 - Second-order selection for evolvability in a large Escherichia coli population JF - Science Y1 - 2011 A1 - Woods, R. J. A1 - Barrick, J. E. A1 - T. F. Cooper A1 - U. Shrestha A1 - M. R. Kauth A1 - Lenski, R.E. VL - 331 ER - TY - JOUR T1 - Second-order selection for evolvability in a large Escherichia coli population JF - Science Y1 - 2011 A1 - Woods, R. J. A1 - Barrick, E A1 - T. F. Cooper A1 - U. Shrestha A1 - M. R. Kauth A1 - Lenski, R.E. VL - 331 ER - TY - JOUR T1 - Adapting MODIS-derived LAI and fractional cover into the RAMS model for East Africa JF - International Journal of Climatology Y1 - 2010 A1 - Moore, Nathan A1 - Torbick, Nathan A1 - Pijanowski, Bryan A1 - Lofrgren, Brent A1 - Wang, Jing A1 - Kim, Dong-Yun A1 - Andresen, Jeffrey A1 - Olson, Jennifer VL - 30 IS - 13 ER - TY - JOUR T1 - Different Truths in Different Worlds JF - Organization Science Y1 - 2010 A1 - Miller, K. D. A1 - Lin, S. VL - 21 ER - TY - JOUR T1 - Equilibrium Molecular Dynamics Study of Lattice Thermal Conductivity/Conductance of Au-SAM-Au Junctions JF - J. Heat Transfer Y1 - 2010 A1 - Tengfei Luo A1 - John R. Lloyd VL - 132 ER - TY - JOUR T1 - Escherichia coli rpoB mutants have increased evolvability in proportion to their fitness defects JF - Molecular Biology and Evolution Y1 - 2010 A1 - Barrick, J. E. A1 - M. R. Kauth A1 - C. C. Strelioff A1 - Lenski, R.E. VL - 27 ER - TY - JOUR T1 - A High-Order Finite-Difference Method for Numerical Simulations of Supersonic Turbulent Flows JF - International Journal of Numerical Methods in Fluids Y1 - 2010 A1 - Li, Z. A1 - Jaberi, F.A. VL - To be published ER - TY - CONF T1 - Large-Scale Simulations of Supersonic Turbulent Reacting Flows T2 - 48th AIAA Aerospace Sciences Meeting Y1 - 2010 A1 - Li, Z. A1 - Jaberi, F.A. A1 - Banaeizadeh, A. AB -The scalar filtered mass density function (FMDF) is further developed and employed for large-eddy simulations (LES) of high speed turbulent flows in complex geometries. LES/FMDF is implemented via an efficient, hybrid numerical method. In this method, the filtered compressible Navier-Stokes equations in curvilinear coordinate systems are solved with a generalized, high-order, multi-block, compact differencing scheme. Turbulent mixing and combustion are modeled with the FMDF. The LES/FMDF method is used for simulations of isotropic turbulent flow in a piston-cylinder assembly, the flow in a shock tube and a supersonic co-axial helium-air jet. The critical role of pressure in the FMDF equation when applied to compressible flows is studied. It is shown that LES/FMDF is reliable and is able to simulate compressible turbulent mixing and combustion in supersonic flows.

JF - 48th AIAA Aerospace Sciences Meeting PB - AIAA CY - Orlando, FL ER - TY - JOUR T1 - Multi-level Extension of the Cluster-In-Molecule Local Correlation Methodology: Merging Coupled-Cluster and Moller-Plesset Perturbation Theories JF - Journal of Physical Chemistry A Y1 - 2010 A1 - Wei Li A1 - Piotr Piecuch AB -A multilevel extension of the local correlation “cluster-in-molecule” (CIM) framework, which enables one to combine different quantum chemistry methods to treat different regions in a large molecular system without splitting it into ad hoc fragments and saturating dangling bonds, is proposed. The resulting schemes combine higher-level methods, such as the completely renormalized coupled-cluster (CC) approach with singles, doubles, and noniterative triples, termed CR-CC(2,3), to treat the reactive part of a large molecular system, and lower-order methods, such as the second-order Møller−Plesset perturbation theory (MP2), to handle the chemically inactive regions. The multilevel CIM-CC/MP2 approaches preserve the key features of all CIM methods, such as the use of orthonormal localized orbitals and coarse-grain parallelism, while substantially reducing the already relatively low costs of the single-level CIM-CC calculations. Illustrative calculations include bond breaking in dodecane and the reactions of the bis(2,4,4-trimethylpentyl)dithiophosphinic acid with one and two water molecules.

VL - 114 IS - 24 ER - TY - JOUR T1 - Non-Equilibrium Molecular Dynamics Study of Thermal Energy Transport in Au-SAM-Au Junctions JF - Int. J. of Heat and Mass Transfer Y1 - 2010 A1 - Tengfei Luo A1 - John R. Lloyd VL - 53 ER - TY - CONF T1 - Numerical Investigations of Shock-Turbulence Interactions in a Planar Mixing Layer T2 - 48th AIAA Aerospace Sciences Meeting Y1 - 2010 A1 - Li, Z. A1 - Jaberi, F.A. AB -Direct numerical simulation (DNS) and large-eddy simulation (LES) of spatially developing supersonic mixing layer, interacting with an oblique shock wave are conducted with a new high-order Monotonicity-Preserving scheme. Without the incident shock, the mixing layer grows linearly and exhibits self-similar behavior after the transition. With the shock, significant small-scale turbulence is generated just behind the shock. With an increase in shock angle, the intensity of the shock-generated turbulence is increased and its peak position shifts away from the mixing layer centerline. The effects of turbulence on the shock are also shown to be very significant, such that normal shocklets and large adverse pressure gradients are created in some conditions. Comparison with the DNS data indicates that the LES with the modified kinetic energy viscosity (MKEV) subgrid stress model is able to predict the main features of the flow and shock-turbulence interactions.

JF - 48th AIAA Aerospace Sciences Meeting PB - AIAA CY - Orlando, FL ER - TY - JOUR T1 - Thermodynamic modeling of transcription: sensitivity analysis differentiates biological mechanism from mathematical model-induced effects JF - BMC Systems Biology Y1 - 2010 A1 - Dresch, J.M. A1 - Liu, X. A1 - Arnosti, D.N. A1 - Ay, A. PB - BioMed Central Ltd VL - 4 ER - TY - JOUR T1 - Constraints on the Density Dependence of the Symmetry Energy JF - Physical Review Letters Y1 - 2009 A1 - M. B. Tsang A1 - Yingxun Zhang A1 - P. Danielewicz A1 - M. Famiano A1 - Li, Z. A1 - W. G. Lynch A1 - A. W. Steiner AB -Collisions involving {112Sn} and {124Sn} nuclei have been simulated with the improved quantum molecular dynamics transport model. The results of the calculations reproduce isospin diffusion data from two different observables and the ratios of neutron and proton spectra. By comparing these data to calculations performed over a range of symmetry energies at saturation density and different representations of the density dependence of the symmetry energy, constraints on the density dependence of the symmetry energy at subnormal density are obtained. The results from the present work are compared to constraints put forward in other recent analyses.

VL - 102 N1 - Copyright {(C)} 2010 The American Physical Society; Please report any problems to prola@aps.org ER - TY - CONF T1 - Large-Scale Simulations of High Speed Turbulent Flows T2 - 47th AIAA Aerospace Sciences Meeting Y1 - 2009 A1 - Li, Z. A1 - Jaberi, F.A. AB -This paper briefly describes a new class of high-order Monotonicity-Preserving (MP) finite difference methods recently developed for direct numerical simulation (DNS) and large-eddy simulation (LES) of high-speed turbulent flows. The MP method has been implemented together with high-order compact (COMP) and weighted essentially non- oscillatory (WENO) methods in a generalized three-dimensional (3D) code and has been applied to various 1D, 2D and 3D problems. For the LES, compressible versions of the gradient-based subgrid-scale closures are employed. Detailed and extensive analysis of various flows indicates that MP schemes have less numerical dissipation and faster grid convergence than WENO schemes. Simulations conducted with high-order MP schemes preserve sharp changes in flow variables without spurious oscillations and capture the turbulence at the smallest simulated scales. The non-conservative form of the scalar equation solved with MP schemes are shown to generate the same results as COMP schemes for supersonic mixing problems involving shock waves.

JF - 47th AIAA Aerospace Sciences Meeting PB - American Institute of Aeronautics and Astronautics CY - Orlando, FL ER - TY - JOUR T1 - Local Correlation Calculations Using Standard and Renormalized Coupled-Cluster Approaches JF - The Journal of Chemical Physics Y1 - 2009 A1 - Wei Li A1 - Piotr Piecuch A1 - J. R Gour A1 - Shuhua Li AB -he linear scaling local correlation approach, termed “cluster-in-molecule” (CIM), is extended to the coupled-cluster (CC) theory with singles and doubles (CCSD) and CC methods with singles, doubles, and noniterative triples, including CCSD(T) and the completely renormalized CR-CC(2,3) approach. The resulting CIM-CCSD, CIM-CCSD(T), and CIM-CR-CC(2,3) methods are characterized by (i) the linear scaling of the CPU time with the system size, (ii) the use of orthonormal orbitals in the CC subsystem calculations, (iii) the natural parallelism, (iv) the high computational efficiency, enabling calculations for much larger systems and at higher levels of CC theory than previously possible, and (v) the purely noniterative character of local triples corrections. By comparing the results of the canonical and CIM-CC calculations for normal alkanes and water clusters, it is shown that the CIM-CCSD, CIM-CCSD(T), and CIM-CR-CC(2,3) approaches accurately reproduce the corresponding canonical CC correlation and relative energies, while offering savings in the computer effort by orders of magnitude.

VL - 131 IS - 11 ER - TY - CONF T1 - A New Model for Numerical Simulations of Two-Phase Turbulent Combustion T2 - National Combustion Meeting Y1 - 2009 A1 - Li, Z. A1 - Jaberi, F.A. JF - National Combustion Meeting PB - National Combustion Meeting CY - Ann Arbor, MI ER - TY - JOUR T1 - Strategies for Online Communities JF - Strategic Management Journal Y1 - 2009 A1 - Miller, K. D. A1 - Fabian, F. H. A1 - Lin, S. VL - 51 ER - TY - JOUR T1 - Survey of Excited State Neutron Spectroscopic Factors for Z=8-28 Nuclei JF - Physical Review Letters Y1 - 2009 A1 - M. B. Tsang A1 - Jenny Lee A1 - S. C. Su A1 - J. Y. Dai A1 - M. Horoi A1 - H. Liu A1 - W. G. Lynch A1 - S. Warren AB -We have extracted 565 neutron spectroscopic factors of sd and fp shell nuclei by systematically analyzing more than 2000 measured (d, p) angular distributions. We are able to compare 125 of the extracted spectroscopic factors to values predicted by large-basis shell-model calculations and evaluate the accuracies of spectroscopic factors predicted by different shell-model interactions in these regions. We find that the spectroscopic factors predicted for most excited states of sd-shell nuclei using the latest {USDA} or {USDB} interactions agree with the experimental values. For fp shell nuclei, the inability of the current models to account for the core excitation and fragmentation of the states leads to considerable discrepancies. In particular, the agreement between data and shell-model predictions for Ni isotopes is not better than a factor of 2 using either the {GXPF1A} or the {XT} interaction.

VL - 102 N1 - Copyright {(C)} 2010 The American Physical Society; Please report any problems to prola@aps.org ER - TY - JOUR T1 - Turbulence-Interface Interactions in a Two-Fluid Homogeneous Flow JF - Physics of Fluids Y1 - 2009 A1 - Li, Z. A1 - Jaberi, F.A. AB -The two-way interactions between the turbulent velocity field and the interface in an incompressible two-fluid homogeneous turbulent flow are studied with a recently developed Lagrangian–Eulerian interfacial particle level-set method. The numerical results confirm that the rate of change of the interface area is directly related to the work done by the surface tension force. While the surface tension damps the surrounding turbulence in the “interface stretching period” to oppose the increase in interface area, it is shown to actually increase the turbulent kinetic energy when the interface experiences compression. Additionally, the surface tension force is found to generate strong vortical motions close to the interface through the baroclinic torque effects. There is also an increase in strain rate and the viscous dissipation rate of turbulent kinetic energy in the interface region. The effect of interface on the surrounding turbulence appears primarily in the direction perpendicular to the interface. Analysis of the vorticity and kinetic energy equations indicates that the turbulence-interface interactions are strongly dependent on the fluids’ density ratio and the Weber number.

VL - 21 IS - 9 ER - TY - JOUR T1 - Ab-initio Molecular Dynamics Study of Nanoscale Thermal Energy Transport JF - J. Heat Transfer Y1 - 2008 A1 - Tengfei Luo A1 - John R. Lloyd VL - 130 ER - TY - JOUR T1 - Application of Renormalized Coupled- Cluster Methods to Potential Function of Water JF - Theoretical Chemistry Accounts: Theory, Computation, and Modeling (THEORETICA CHIMICA ACTA) Y1 - 2008 A1 - J. Zheng A1 - J. R Gour A1 - J.J. Lutz A1 - M. Wloch A1 - Piotr Piecuch A1 - Truhlar, D.G. AB -The goal of this paper is to examine the performance of the conventional and renormalized single-reference coupled-cluster (CC) methods in calculations of the potential energy surface of the water molecule. A comparison with the results of the internally contracted multi-reference configuration interaction calculations including the quasi-degenerate Davidson correction (MRCI(Q)) and the spectroscopically accurate potential energy surface of water resulting from the use of the energy switching (ES) approach indicates that the relatively inexpensive completely renormalized (CR) CC methods with singles (S), doubles (D), and a non-iterative treatment of triples (T) or triples and quadruples (TQ), such as CR-CCSD(T), CR-CCSD(TQ), and the recently developed rigorously size extensive extension of CR-CCSD(T), termed CR-CC(2,3), provide substantial improvements in the results of conventional CCSD(T) and CCSD(TQ) calculations at larger internuclear separations. It is shown that the CR-CC(2,3) results corrected for the effect of quadruply excited clusters through the CR-CC(2,3)+Q approach can compete with the highly accurate MRCI(Q) data. The excellent agreement between the CR-CC(2,3)+Q and MRCI(Q) results suggests ways of improving the global potential energy surface of water resulting from the use of the ES approach in the regions of intermediate bond stretches and intermediate energies connecting the region of the global minimum with the asymptotic regions.

VL - 120 IS - 1-3 ER - TY - JOUR T1 - The Biermann Battery in Cosmological MHD Simulations of Population III Star Formation JF - \apjl Y1 - 2008 A1 - Xu, H. A1 - O'Shea, B. W. A1 - Collins, D. C. A1 - Norman, M. L. A1 - Li, H. A1 - Shuhua Li KW - cosmology: theory KW - Galaxies: High-Redshift KW - Magnetohydrodynamics: MHD KW - stars: formation VL - 688 ER - TY - JOUR T1 - A Comparative Assessment of the Perturbative and Renormalized Coupled Cluster Theories with a Non-iterative Treatment of Triple Excitations for Thermochemical Kinetics, Including a Study of Basis Set and Core Correlation E JF - The Journal of Chemical Physics Y1 - 2008 A1 - J. Zheng A1 - J. R Gour A1 - J.J. Lutz A1 - M. Wloch A1 - Piotr Piecuch A1 - Truhlar, D.G. AB -The CCSD, CCSD(T), and CR-CC(2,3) coupled cluster methods, combined with five triple-zeta basis sets, namely, MG3S, aug-cc-pVTZ, aug-cc-pV(T+d)Z, aug-cc-pCVTZ, and aug-cc-pCV(T+d)Z, are tested against the DBH24 database of diverse reaction barrier heights. The calculations confirm that the inclusion of connected triple excitations is essential to achieving high accuracy for thermochemical kinetics. They show that various noniterative ways of incorporating connected triple excitations in coupled cluster theory, including the CCSD(T) approach, the full CR-CC(2,3) method, and approximate variants of CR-CC(2,3) similar to the triples corrections of the CCSD(2) approaches, are all about equally accurate for describing the effects of connected triply excited clusters in studies of activation barriers. The effect of freezing core electrons on the results of the CCSD, CCSD(T), and CR-CC(2,3) calculations for barrier heights is also examined. It is demonstrated that to include core correlation most reliably, a basis set including functions that correlate the core and that can treat core-valence correlation is required. On the other hand, the frozen-core approximation using valence-optimized basis sets that lead to relatively small computational costs of CCSD(T) and CR-CC(2,3) calculations can achieve almost as high accuracy as the analogous fully correlated calculations.

VL - 128 IS - 4 ER - TY - CONF T1 - Filtered Mass Density Function for Numerical Simulations of Spray Combustion T2 - 46th AIAA Aerospace Sciences Meeting and Exhibit Y1 - 2008 A1 - Li, Z. A1 - Jaberi, F.A. A1 - Yaldizli, M. AB -This paper briefly describes our recent efforts on the modeling and numerical simulations of two-phase turbulent reacting flows in realistic combustion systems with a new large-eddy simulation (LES) model. The model is constructed based on the two-phase extension of scalar filtered mass density function (FMDF) and a Lagrangian-Eulerian- Lagrangian mathematical/numerical methodology. In this methodology, the “resolved” fluid velocity field is obtained by solving the filtered form of the compressible Navier-Stokes equations with a high-order finite difference scheme. The liquid (droplet) phase and scalar (temperature and species mass fractions) fields are both obtained by stochastic Lagrangian models. There are two-way interactions between the phases and all the Eulerian and Lagrangian fields. The LES/FMDF is used for systematic analysis of turbulent combustion in the spray-controlled dump combustor and double-swirl spray burner for various flow and spray parameters. The effects of fuel type, spray angle, mass loading ratio, droplet size distribution, fuel/air composition, wall, and inflow/outflow conditions on the combustion are investigated. It has been found that the main features of the turbulence and combustion are modified by changing the inflow/outflow conditions. The LES/FMDF results also confirm the significance of the spray parameters.

JF - 46th AIAA Aerospace Sciences Meeting and Exhibit PB - AIAA CY - Reno, Nevada ER - TY - JOUR T1 - A Hybrid Langrangian-Eulerian Particle-Level Set Method for numerical Simulations of Two-Fluid Turbulent Flows JF - International Journal for Numerical Methods in Fluids Y1 - 2008 A1 - Li, Z. A1 - Jaberi, F.A. A1 - Shih, T. I-P. KW - two-fluid turbulent flows; particle-level set method; interface tracking AB -A coupled Lagrangian interface-tracking and Eulerian level set (LS) method is developed and implemented for numerical simulations of two-fluid flows. In this method, the interface is identified based on the locations of notional particles and the geometrical information concerning the interface and fluid properties, such as density and viscosity, are obtained from the LS function. The LS function maintains a signed distance function without an auxiliary equation via the particle-based Lagrangian re-initialization technique. To assess the new hybrid method, numerical simulations of several ‘standard interface-moving’ problems and two-fluid laminar and turbulent flows are conducted. The numerical results are evaluated by monitoring the mass conservation, the turbulence energy spectral density function and the consistency between Eulerian and Lagrangian components. The results of our analysis indicate that the hybrid particle-level set method can handle interfaces with complex shape change, and can accurately predict the interface values without any significant (unphysical) mass loss or gain, even in a turbulent flow. The results obtained for isotropic turbulence by the new particle-level set method are validated by comparison with those obtained by the ‘zero Mach number’, variable-density method. For the cases with small thermal/mass diffusivity, both methods are found to generate similar results. Analysis of the vorticity and energy equations indicates that the destabilization effect of turbulence and the stability effect of surface tension on the interface motion are strongly dependent on the density and viscosity ratios of the fluids. Copyright q 2007 John Wiley & Sons, Ltd.

VL - 56 IS - 12 ER - TY - JOUR T1 - The influence of cluster emission and the symmetry energy on neutron-proton spectral double ratios JF - Physics Letters B Y1 - 2008 A1 - Yingxun Zhang A1 - P. Danielewicz A1 - M. Famiano A1 - Li, Z. A1 - W. G. Lynch A1 - M. B. Tsang AB -The emissions of neutrons, protons and bound clusters from central {124Sn} + {124Sn} and {112Sn} + {112Sn} collisions are simulated using the Improved Quantum Molecular Dynamics model for two different density-dependent symmetry-energy functions. The calculated neutron-proton spectral double ratios for these two systems are sensitive to the density dependence of the symmetry energy, consistent with previous work. Cluster emission increases the double ratios in the low energy region relative to values calculated in a coalescence-invariant approach. To circumvent uncertainties in cluster production and secondary decays, it is important to have more accurate measurements of the neutron-proton ratios at higher energies in the center of mass system, where the influence of such effects is reduced.

VL - 664 ER - TY - CONF T1 - Large Eddy Simulations of Two-Phase Turbulent Reacting Flows T2 - 46TH AIAA Aerospace Sciences Meeting and Exhibit Y1 - 2008 A1 - Jaberi, F.A. A1 - Li, Z. JF - 46TH AIAA Aerospace Sciences Meeting and Exhibit PB - AMERICAN INSTITUTE OF AERONAUTICS AND ASTRONAUTICS CY - Reno, Nevada ER - TY - JOUR T1 - Natural selection fails to optimize mutation rates for long-term adaptation on rugged fitness landscapes JF - PLoS Computational Biology Y1 - 2008 A1 - Clune, J. A1 - Misevic, D. A1 - Ofria, C. A1 - Lenski, R.E. A1 - Elena, S.F. A1 - Sanjuán, R. PB - Public Library of Science VL - 4 ER - TY - JOUR T1 - Transport Model Simulations of Projectile Fragmentation Reactions at 140 {MeV/nucleon} JF - Physical Review C Y1 - 2008 A1 - M. Mocko A1 - M. B. Tsang A1 - D. Lacroix A1 - A. Ono A1 - P. Danielewicz A1 - W. G. Lynch A1 - R. J Charity KW - Nuclear Experiment KW - Nuclear Theory AB -The collisions in four different reaction systems using {\$ˆ{40,48}\$Ca} and {\$ˆ{58,64}\$Ni} isotope beams and a Be target have been simulated using the Heavy Ion Phase Space Exploration and the Antisymmetrized Molecular Dynamics models. The present study mainly focuses on the model predictions for the excitation energies of the hot fragments and the cross sections of the final fragments produced in these reactions. The effects of various factors influencing the final fragment cross sections, such as the choice of the statistical decay code and its parameters have been explored. The predicted fragment cross sections are compared to the projectile fragmentation cross sections measured with the A1900 mass separator. At {\$E/A=140\$} {MeV,} reaction dynamics can significantly modify the detection efficiencies for the fragments and make them different from the efficiencies applied to the measured data reported in the previous work. The effects of efficiency corrections on the validation of event generator codes are discussed in the context of the two models.

VL - 78 IS - 2 N1 - {Phys.Rev.C78:024612,2008} ER - TY - JOUR T1 - Coupled-Cluster and Configuration-Interaction Calculations for Heavy Nuclei JF - Physical Review Lettters Y1 - 2007 A1 - M. Horoi A1 - J. R Gour A1 - M. Wloch A1 - M.D. Lodriguito A1 - B. A. Brown A1 - Piotr Piecuch AB -We compare coupled-cluster (CC) and configuration-interaction (CI) results for 56Ni obtained in the pf-shell basis, focusing on practical CC approximations that can be applied to systems with dozens or hundreds of correlated fermions. The weight of the reference state and the strength of correlation effects are controlled by the gap between the f7/2 orbit and the f5/2, p3/2, p1/2 orbits. Independent of the gap, the CC method with 1p-1h and 2p-2h clusters and a noniterative treatment of 3p-3h clusters is as accurate as the more demanding CI approach truncated at the 4p-4h level.

VL - 98 IS - 11 ER - TY - CONF T1 - Filtered Mass Density Function for Numerical Simulations of Spray Combustion T2 - 46th AIAA Aerospace Sciences Meeting and Exhibit Y1 - 2007 A1 - Yaldizli, M. A1 - Li, Z. A1 - Jaberi, F.A. AB -This paper briefly describes our recent efforts on the modeling and numerical simulations of two-phase turbulent reacting flows in realistic combustion systems with a new large-eddy simulation (LES) model. The model is constructed based on the two-phase extension of scalar filtered mass density function (FMDF) and a Lagrangian-Eulerian- Lagrangian mathematical/numerical methodology. In this methodology, the “resolved” fluid velocity field is obtained by solving the filtered form of the compressible Navier-Stokes equations with a high-order finite difference scheme. The liquid (droplet) phase and scalar (temperature and species mass fractions) fields are both obtained by stochastic Lagrangian models. There are two-way interactions between the phases and all the Eulerian and Lagrangian fields. The LES/FMDF is used for systematic analysis of turbulent combustion in the spray-controlled dump combustor and double-swirl spray burner for various flow and spray parameters. The effects of fuel type, spray angle, mass loading ratio, droplet size distribution, fuel/air composition, wall, and inflow/outflow conditions on the combustion are investigated. It has been found that the main features of the turbulence and combustion are modified by changing the inflow/outflow conditions. The LES/FMDF results also confirm the significance of the spray parameters.

JF - 46th AIAA Aerospace Sciences Meeting and Exhibit PB - AIAA CY - Reno, Nevada ER - TY - CONF T1 - A New Model for Large Eddy Simulations of Multi-Phase Turbulent Combustion T2 - Proceedings of the 43rd AIAA/ASME/SAI/ASEE Joint Propulsion Conference Y1 - 2007 A1 - Yaldizli, M. A1 - Li, Z. A1 - J.A. Jaberi AB -Numerical simulations of a spray-controlled lean premixed dump combustor are con- ducted via a two-phase large eddy simulation (LES) methodology. In this methodology, the velocity field is obtained by a high-order finite difference method. The subgrid gas- liquid combustion closure is based on the two-phase filtered mass density function (FMDF) method and the spray is modeled with a Lagrangian scheme. The effects of spray, fuel/air composition, and inflow/outflow conditions on the combustion are investigated. It has been found that the main features of the turbulence and combustion inside the dump combustor are very differently modified by the spray for different spray parameters. The LES/FMDF results also indicate the significance of the inflow and outflow conditions.

JF - Proceedings of the 43rd AIAA/ASME/SAI/ASEE Joint Propulsion Conference PB - AIAA/ASME/SAI/ASEE CY - Cincinnati, Ohio ER - TY - Generic T1 - Numerical Simulations of Two-Phase Turbulent Combustion in Spray Burners T2 - ASME Conference Proceedings, Computers and Information in Engineering Conference Y1 - 2007 A1 - Li, Z. A1 - Yaldizli, M. A1 - Jaberi, F.A. AB -The complex interactions among turbulence, combustion and spray in liquid-fuel burners are modeled and simulated via a new two-phase Lagrangian-Eulerian-Lagrangian large eddy simulation (LES) methodology. In this methodology, the spray is modeled with a Lagrangian mathematical/computational method which allows two-way mass, momentum and energy coupling between phases. The subgrid gas-liquid combustion is based on the two-phase filtered mass density function (FMDF) that has several advantages over “conventional” two-phase combustion models. The LES/FMDF is employed in conjunction with non-equilibrium reaction and droplet models. Simulations of turbulent combustion in a spray-controlled double-swirl burner are conducted via LES/FMDF. The generated results are used for better understanding of spray combustion in realistic turbulent flow configurations. The effects of spray angle, mass loading ratio, fuel type, droplet size distribution, wall and inflow/outflow conditions on the flow and combustion are investigated. The LES/FMDF predictions are shown to be consistent with the experimental results.

JF - ASME Conference Proceedings, Computers and Information in Engineering Conference PB - ASME CY - Las Vegas, Nevada SN - 0-7918-4803-5 ER - TY - JOUR T1 - Half-life and spin of 60Mng JF - Physical Review C Y1 - 2006 A1 - S. N. Liddick A1 - P. F. Mantica A1 - B. A. Brown A1 - M. P. Carpenter A1 - A. D. Davies A1 - M. Horoi A1 - R. V. F. Janssens A1 - A. C. Morton A1 - W. F. Mueller A1 - J. Pavan A1 - H. Schatz A1 - A. Stolz A1 - S. L. Tabor A1 - B. E. Tomlin A1 - M. Wiedeking AB -A value of 0.28±0.02 s has been deduced for the half-life of the ground state of {60Mn,} in sharp contrast to the previously adopted value of 51±6 s. Access to the low-spin {60Mn} ground state was accomplished via β decay of the 0+ {60Cr} parent nuclide. New low-energy states in {60Mn} have been identified from β-delayed γ-ray spectroscopy. The new, shorter half-life of {60Mng} is not suggestive of isospin-forbidden β decay, and new spin and parity assignments of 1+ and 4+ have been adopted for the ground and isomeric β-decaying states, respectively, of {60Mn.}

VL - 73 IS - 4 N1 - Copyright {(C)} 2010 The American Physical Society; Please report any problems to prola@aps.org ER - TY - JOUR T1 - Half-life and spin of 60Mng JF - PHYSICAL REVIEW C Y1 - 2006 A1 - S. N. Liddick A1 - P. F. Mantica A1 - B. A. Brown A1 - M. P. Carpenter A1 - A. D. Davies A1 - M. Horoi A1 - R. V. F. Janssens A1 - A. C. Morton A1 - W. F. Mueller A1 - J. Pavan A1 - H. Schatz A1 - A. Stolz A1 - S. L. Tabor A1 - B. E. Tomlin A1 - M. Wiedeking VL - 73 UR - http://journals.aps.org/prc/abstract/10.1103/PhysRevC.73.044322 IS - 4 ER - TY - JOUR T1 - Non-Iterative Coupled- Cluster Methods Employing Multi-Reference Perturbation Theory Wave Functions JF - Journal of Molecular Structure: THEOCHEM Y1 - 2006 A1 - Piotr Piecuch A1 - M.D. Lodriguito A1 - K. Kowalski A1 - M. Wloch KW - Coupled-cluster theory; Equation-of-motion coupled-cluster methods; Method of moments of coupled-cluster equations; Multi-reference perturbation theory; Non-iterative coupled-cluster methods AB -A new class of non-iterative coupled-cluster (CC) methods, which improve the results of standard CC and equation-of-motion (EOM) CC calculations for ground and excited-state potential energy surfaces along bond breaking coordinates and for excited states dominated by two-electron transitions, is explored. The proposed approaches combine the method of moments of coupled-cluster equations (MMCC), in which the a posteriori corrections due to higher-order correlations are added to standard CC/EOMCC energies, with the multi-reference many-body perturbation theory (MRMBPT), which provides information about the most essential non-dynamic and dynamic correlation effects that are relevant to electronic quasi-degeneracies. The performance of the basic MRMBPT-corrected MMCC approximation, in which inexpensive non-iterative corrections due to triple excitations are added to ground- and excited-state energies obtained with the CC/EOMCC singles and doubles approach, is illustrated by the results of a few test calculations, including bond breaking in HF and H2O, and excited states of CH+.

VL - 771 IS - 1-3 ER - TY - CHAP T1 - Non-iterative Coupled-Cluster Methods for Excited Electronic States T2 - Progress in Theoretical Chemistry and Physics Y1 - 2006 A1 - Piotr Piecuch A1 - M. Wloch A1 - M. Lodriguito A1 - J. R Gour JF - Progress in Theoretical Chemistry and Physics VL - 15 ER - TY - JOUR T1 - Two New Classes of Non-Iterative Coupled-Cluster Methods Derived from the Method of Moments of Coupled-Cluster Equations JF - Molecular Physics Y1 - 2006 A1 - Piotr Piecuch A1 - M. Wloch A1 - M.D. Logriguito A1 - J. R Gour VL - 104 IS - 13 & 14 ER - TY - JOUR T1 - Method of moments of coupled-cluster equations: a new formalism for designing accurate electronic structure methods for ground and excited states JF - Theoretical Chemistry Accounts: Theory, Computation, and Modeling Y1 - 2004 A1 - Piotr Piecuch A1 - K. Kowalski A1 - I. S. O. Pimienta A1 - P.-D. Fan A1 - M.D. Lodriguito A1 - M. J. {McGuire} A1 - S. A. Kucharski A1 - T. Kuś A1 - M. Musial KW - Coupled-cluster theory - Method of moments of coupled-cluster equations - Renormalized coupled-cluster methods - extended coupled cluster theory - Potential energy surfaces AB -The method of moments of coupled-cluster equations {(MMCC),} which provides a systematic way of improving the results of the standard coupled-cluster {(CC)} and equation-of-motion {CC} {(EOMCC)} calculations for the ground- and excited-state energies of atomic and molecular systems, is described. The {MMCC} theory and its generalized {MMCC} {(GMMCC)} extension that enables one to use the cluster operators resulting from the standard as well as nonstandard {CC} calculations, including those obtained with the extended {CC} {(ECC)} approaches, are based on rigorous mathematical relationships that define the many-body structure of the differences between the full configuration interaction {(CI)} and {CC} or {EOMCC} energies. These relationships can be used to design the noniterative corrections to the {CC/EOMCC} energies that work for chemical bond breaking and potential energy surfaces of excited electronic states, including excited states dominated by double excitations, where the standard single-reference {CC/EOMCC} methods fail. Several {MMCC} and {GMMCC} approximations are discussed, including the renormalized and completely renormalized {CC/EOMCC} methods for closed- and open-shell states, the quadratic {MMCC} approaches, the {CI-corrected} {MMCC} methods, and the {GMMCC} approaches for multiple bond breaking based on the {ECC} cluster amplitudes.

VL - 112 ER -