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MAR
7
Saturday
Brookhaven Women In Science (BWIS) Event
"International Women's Day Celebration 'Girl Power in STEM: Make It Happen!'"
9:30 am, Stony Brook University
Saturday, March 7, 2015, 9:30 am
Invited speakers: Dr. Nancy Goroff and Dr. Ágnes Mócsy Panelists: Nathalie Bouet, Betsy Dowd, Kathleen Flint Elm, Deena Ghoul, Arnavi Varshney,Glenda Denicolo, Marci Lobel, Jennifer McDermott, Evgeniya Rubin, Megan Russ, Eva Songcuan Speed date a Scientist: selected panelists will be available for a one on one Q&A
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MAR
10
Tuesday
Brookhaven Women In Science (BWIS) Event
"CARE 2015: Career Advancement in a Research Environment"
8:30 am, Brookhaven Center
Tuesday, March 10, 2015, 8:30 am
Hosted by: Christina Swinson
Open to Stony Brook and BNL early career scientists and Postdocs, CARE 2015 will focus on career development. The workshop will explore the options available to early-career scientists in addition to the traditional R&D and academic pathways. Invited speakers will describe their career paths and discuss the special requirements and planning involved in achieving their goals. An interactive session will guide participants in developing prototype Individual Development Plans (IDPs).
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MAR
10
Tuesday
Center for Functional Nanomaterials Colloquium
"The bulk photovoltaic effect in polar oxides for robust and efficient solar energy harvesting"
Presented by Andrew M. Rappe, University of Pennsylvania
11 am, Bldg 735, Seminar Room 2nd Floor
Tuesday, March 10, 2015, 11:00 am
Hosted by: Deyu Lu
Solar energy is the most promising source of renewable, clean energy to replace the current reliance on fossil fuels. Ferroelectric (FE) materials have recently attracted increased attention as a candidate class of materials for use in photovoltaic devices. Their strong inversion symmetry breaking due to spontaneous polarization allows for excited carrier separation by the bulk of the material and voltages higher than the band gap (Eg), which may allow efficiencies beyond the Shockley-Queisser limit. Ferroelectric oxides are also robust and can be fabricated using low cost methods such as sol-gel thin film deposition and sputtering. Recent work has shown how a decrease in ferroelectric layer thickness and judicious engineering of domain structures and FE-electrode interfaces can dramatically increase the current harvested from FE absorber materials. Further improvements have been blocked by the wide band gaps (Eg =2.7-4 eV) of FE oxides, which allow the use of only 8-20% of the solar spectrum and drastically reduce the upper limit of photovoltaic efficiency. In this talk, I will discuss new insight into the bulk photovoltaic effect, and materials design to enhance the photovoltaic efficiency. We calculate from first principles the current arising from the "shift current" mechanism, and demonstrate that it quantitatively explains the observed current. Then, we analyze the electronic features that lead to strong photovoltaic effects. Finally, we present new oxides that are strongly polar yet have band gaps in the visible range, offering prospects for greatly enhanced bulk photovoltaic effects. Please note: If anyone would like to schedule a meeting with Dr. Rappe, please contact Deyu Lu (dlu@bnl.gov)
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MAR
10
Tuesday
Sustainable Energy Technologies Seminar
"Surfactant Free Synthesis of Plasmonic Nanoparticles and Their Application in Optical Detection of Explosives and Ions"
Presented by Devika Sil, Temple University, Philadelphia
2 pm, ISB 734 2nd Floor Seminar Room 201
Tuesday, March 10, 2015, 2:00 pm
Hosted by: Matthew Eisaman
The localized surface plasmon resonance (LSPR), arising due to the collective oscillation of free electrons in metal nanoparticles, is a sensitive probe of the nanostructure and its surrounding dielectric medium. Synthetic strategies for developing surfactant free nanoparticles providing direct access to the metallic surface that harvest the localized surface plasmons will be discussed first followed by the applications. It is well known that the hot carriers generated as a result of plasmonic excitation can participate and catalyze chemical reactions. One such reaction is the dissociation of hydrogen. By the virtue of plasmonic excitation, an inert metal like Au can become reactive enough to support the dissociation of hydrogen at room temperature, thereby making it possible to optically detect this explosive gas.1 The mechanism of sensing is still not well understood. However, a potential hypothesis is that the dissociation of hydrogen may lead to the formation of a metastable gold hydride with optical properties distinct from the initial Au nanostructures, causing a reversible increase in transmission and blue shift in LSPR. It will also be shown that by tracking the LSPR of bare Au nanoparticles grown on a substrate, the adsorption of halide ions on Au can be detected exclusively. The shift in LSPR frequency is attributed to changes in electron density rather than the morphology of the nanostructures, which is often the case.
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MAR
11
Wednesday
Center for Functional Nanomaterials Seminar
"Development and Implementation of Diffraction Imaging Techniques"
Presented by Shashidhara Marathe, PhD
10 am, CFN, Bldg. 735, conference room A, 1st fl.
Wednesday, March 11, 2015, 10:00 am
Hosted by: Kevin Yager
Center for Functional Nanomaterials Seminar Wednesday, March 11, 2015 10:00 a.m. - 11:00 a.m. Conference Room A, 1st floor Development and Implementation of Diffraction Imaging Techniques using Coherent Beams Shashidhara Marathe, PhD This presentation describes development of two different diffraction imaging techniques using coherent beams. At first, I will elucidate the Coherent Diffraction Imaging (CDI) technique implemented in reflection geometry for surface image reconstruction. It will be shown that the reflected intensity from the sample surface, measured in the Fraunhofer region, can be used to retrieve the exit wave phase information, quantitatively, without a priori knowledge of the object [1]. For practical applications, where objected to be reconstructed is laying on a substrate, it is much more desirable to use the reflection based CDI rather than the conventional CDI in transmission mode. Efforts in developing CDI techniques using hard x-ray sources at the Advanced Photon Source (APS), USA, and the Pohang Light Source (PLS), South Korea, will also be discussed. Next, I will talk about development and implementation of X-ray Grating Talbot Interferometer (XGTI) at the APS, Argonne National Laboratory (ANL), IL, USA. This is a tri-modal, non-destructive x-ray imaging technique which not only generates the radiograph of the object under investigation but also the differential phase and the dark-field (SAXS) images, simultaneously, from a single interferogram. In particular, I will talk about developing the single-grating x-ray Talbot Interferometer. A single-grating x-ray Talbot interferometer makes full use of the beam coherence available with synchrotron source compared to other laboratory based x-ray sources. This simplifies the setup and the alignment. Moreover, this technique is very useful for in-situ, time-resolved, measur
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MAR
11
Wednesday
BSA Noon Recital
"Solomiya Ivakhiv & Di Wu"
12 pm, Berkner Hall Auditorium
Wednesday, March 11, 2015, 12:00 pm
Hosted by: BSA
Pianist Di Wu and violinist Solomiya Ivakhiv will perform in concert at the U.S. Department of Energy's Brookhaven National Laboratory on Wednesday, March 11, at noon in Berkner Hall. Sponsored by Brookhaven Science Associates (BSA), the event is free and open to the public. All visitors to the Laboratory 16 and older must bring a photo I.D.
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MAR
13
Friday
Nuclear Physics & RIKEN Theory Seminar
"Hydrodynamic transport coefficients for the non-conformal quark-gluon plasma from holography"
Presented by Jorge Noronha, Sao Paulo University
2 pm, Small Seminar Room, Bldg. 510
Friday, March 13, 2015, 2:00 pm
Hosted by: Soeren Schlichting
: In this talk we shall present holographic formulas for the transport coefficients κ and τπ present in the second-order derivative expansion of relativistic hydrodynamics in curved spacetime associated with a non-conformal strongly coupled plasma described holographically by an Einstein+Scalar action in the bulk. These coefficients are computed as functions of the temperature in a bottom-up non-conformal model that is tuned to reproduce lattice QCD thermodynamics at zero baryon chemical potential. We directly compute, besides the speed of sound, 6 other transport coefficients that appear at second-order in the derivative expansion. We also give an estimate for the temperature dependence of 11 other transport coefficients taking into account the simplest contribution from non-conformal effects that appear near the QCD crossover phase transition. Using these results, we construct an Israel-Stewart-like theory in flat spacetime containing 13 of these 17 transport coefficients that should be suitable for phenomenological applications in the context of numerical hydrodynamic simulations of the strongly-coupled, non-conformal quark-gluon plasma. Using several different approximations, we give parametrizations for the temperature dependence of all the second-order transport coefficients that appear in this theory in a format that can be easily implemented in existing numerical hydrodynamic codes
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MAR
18
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, March 18, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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MAR
20
Friday
Joint NT/RIKEN Seminar
"Flow-like behavior in small systems — Multi-parton interactions and color reconnection effects at the LHC"
Presented by Antonio Ortiz Velasquez, National Autonomous University of Mexico
2 pm, Small Seminar Room, Bldg. 510
Friday, March 20, 2015, 2:00 pm
Hosted by: Soeren Schlichting
Collectivity in high multiplicity pp and p-Pb collisions is the most unexpected discovery at the LHC, its origin is still an open question. In heavy ion collisions, collectivity is attributed to final state effects due to the presence of a hot and dense QCD medium, and it is well described by viscous hydrodynamical calculations with fluctuating initial state geometries. Surprisingly, calculations which employ hydrodynamics reproduce qualitatively well the features of p-Pb data, but, the applicability of hydro in small systems faces conceptual problems. This is not the case of other approaches which do not require a medium to be formed and also are able to reproduce qualitatively well some features of data. In this talk it will be shown that multi-parton interactions and color reconnection (CR) produce flow-like effects in high multiplicity pp collisions. A study of the transverse momentum (pT) distribution of identified hadrons as a function of the event multiplicity will be presented. This comprises studies of the average pT vs hadron mass and number of constituent quarks, and a pT differential study using the Boltzmann-Gibbs Blast-Wave model. A comparison between hydro and color reconnection calculations will be presented. In this context, the results from the same study using LHC data (pp, p-Pb and Pb-Pb collisions) will be discussed.
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APR
1
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, April 1, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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APR
2
Thursday
Particle Physics Seminar
"Neutrino Oscillations with IceCube"
Presented by Tyce DeYoung, Michigan State University
3 pm, Small Seminar Room, Bldg. 510
Thursday, April 2, 2015, 3:00 pm
Hosted by: Elizabeth Worcester
The IceCube Neutrino Observatory is the world's largest neutrino detector. Although designed to detect TeV " PeV scale neutrinos from astrophysical accelerators, IceCube's DeepCore infill array permits searches for dark matter and measurements of neutrino oscillations in the 10-100 GeV range. The most recent measurements of muon neutrino disappearance with IceCube DeepCore will be presented, and prospects for future neutrino physics measurements with IceCube and the proposed PINGU array will be discussed
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APR
3
Friday
Nuclear Theory/RIKEN seminar
"Gravitational collapse, holography and hydrodynamics in extreme conditions"
Presented by Paul Chesler, Harvard University
2 pm, Small Seminar Room, Bldg. 510
Friday, April 3, 2015, 2:00 pm
Hosted by: Soeren Schlichting
A remarkable observation from RHIC and the LHC is that the quark-gluon plasma produced in heavy-ion collisions behaves as a strongly coupled and nearly ideal liquid. Data also suggests that the debris produced by proton-nucleus collisions can also behave as a liquid. Understanding the dynamics responsible for the rapid equilibration of such tiny droplets is an outstanding problem. In recent years holography has emerged as a powerful tool to study non-equilibrium phenomena, mapping challenging quantum dynamics onto the classical dynamics of gravitational fields in one higher dimension. In the dual gravitational description the process of quark-gluon plasma formation and equilibration maps onto the process of gravitational collapse and black hole formation. I will describe how one can apply techniques and lessons learned from numerical relativity to holography and present recent work on holographic models of high energy collisions and the applicability of hydrodynamics to tiny droplets of quark-gluon plasma.
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APR
15
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, April 15, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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APR
22
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, April 22, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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APR
29
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, April 29, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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MAY
6
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, May 6, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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MAY
13
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, May 13, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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MAY
20
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, May 20, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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MAY
27
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, May 27, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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JUN
3
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, June 3, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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JUN
10
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, June 10, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
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JUN
17
Wednesday
Hospitality Coffee & Playgroup Event
"Hospitality Coffee & Playgroup"
10 am, Recreation Hall, Bldg. 317
Wednesday, June 17, 2015, 10:00 am
Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.
