NIST Technicalendar March 23 to March 27, 2009 The NIST Technicalendar is issued each Friday. All items MUST be submitted electronically from this web page by 12:00 NOON each Wednesday unless otherwise stated in the NIST Technicalendar. The address for online weekly editions of the NIST Technicalendar and NIST Administrative Calendar is: http://www.nist.gov/tcal/.

In this Issue: Meetings at NIST Meetings Elsewhere Announcements Talks by NIST Personnel NIST Web Site Announcements NIST Administrative Calendar (current)   NIST Vacancy Announcements (current)

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No Scheduled Events

10:00 AM - Neutron Structure Using a Polarized 3He Target: Measurement of the Electric Form Factor of the Neutron at High Momentum Transfer
10:30 AM - On the Modeling of Pedestrian Motion
10:30 AM - Control of the energy-momentum relation in cold atom systems: effective vector potentials
2:00 PM - Quantum Antidots: Spin-Resolved Transport and Quantum Structure

10:30 AM - Metallic nanoantennas for field-enhanced spectroscopy and microscopy: from visible to terahertz
10:30 AM - Modeling the SEM for Dimensional Metrology

No Scheduled Events

10:30 AM - Dynamics of Escherichia Coli Propagation, Biofilm Formation and Evolution
1:30 PM - Near-field Characterization of the Nanophotonic Devices

3/23 -- MONDAY

No Scheduled Events

3/24 -- TUESDAY

10:00 AM - IONIZING RADIATION DIVISION SEMINAR: Neutron Structure Using a Polarized 3He Target: Measurement of the Electric Form Factor of the Neutron at High Momentum Transfer
The electromagnetic structure of protons and neutrons are described by four form factors. The proton's electric and magnetic form factors and the neutron's magnetic form factor are well known over a large range of momentum transfer. Knowledge of the neutron's electric form factor is made difficult by the overall neutral electric charge, as well as the lack of free neutron targets of sufficient luminosity. A recent experiment at Jefferson Lab has doubled the measured range of momentum transfer for determination of the neutron electric form factor. As in prior experiments, they employed a polarized 3He target as a practical approximation to a free neutron target. Preliminary results will be discussed with a particular emphasis on how this measurement constrains low momentum transfer fits to the world's data. In addition, the improvement in the polarized 3He target obtained from hybrid spin exchange optical pumping will be presented.
Aiden Kelleher , William and Mary. ,.
235 Bldg, Rm. E100. (NIST Contact: Thomas Gentile, 301-975-5431, thomas.gentile@nist.gov)

10:30 AM - FIRE RESEARCH DIVISION SEMINAR: On the Modeling of Pedestrian Motion
The accurate prediction of pedestrian motion can be used to assess the potential safety hazards and operational performance at events where many individuals are gathered. Examples of such situations are sport and music events, cinemas and theatres, museums, conference centers, places of pilgrimage and worship, as well as street demonstrations. Evacuation from airplanes, ships and trains also represent cases where the prediction of pedestrian motion can be used advantageously. A model for the simulation of pedestrian flows and crowd dynamics has been developed. The model considers each individual, and is based on Newtonian dynamics with a series of forces, such as: will forces (the desire to reach a place at a certain time), pedestrian collision avoidance forces, obstacle/wall avoidance forces; pedestrian contact forces, and obstacle/wall contact forces. Except for the will force, it is assumed that for any given pedestrian these forces are the result of only local (nearest neighbour) situations. The near-neighbour search problem is solved by an extremely efficient incremental Delaunay triangulation that is updated at every timestep. In order to allow for general geometries a so-called background triangulation is used to carry all geographic information. At any given time the location of any given pedestrian is updated on this mesh. The results obtained to date show that the model performs well for standard benchmarks (velocity/density curves in passages, exit through narrow passages, etc.), and allows for typical crowd dynamics, such as lane forming, overtaking, avoidance of obstacles and panic behaviour.
Prof. Rainald Lohner , Center for Computational Fluid Dynamics, George Mason University,.
Bldg 224, Rm B245. (NIST Contact: Rodney Bryant, 301-975-6487, rodney.bryant@nist.gov)

10:30 AM - ATOMIC PHYSICS DIVISION SEMINAR: Control of the energy-momentum relation in cold atom systems: effective vector potentials
Ultra cold atoms are remarkable systems with a truly unprecedented level of experimental control. One application of this control is to engineer the system Hamiltonian. To date this engineering has focused mostly on the real-space potential that the atoms experience -- for example, multiple-well traps or optical lattice potentials. Here we present our experimental work which tailors the energy-momentum dispersion of the cold atoms, while leaving the real-space potential unchanged. We couple different internal states of rubidium 87 via a momentum-selective Raman transition and load our system into the resulting adiabatic eigenstates. Using this technique we show a controlled modification of the energy-momentum dispersion and discuss the application of this technique for simulating the motion of changed particles in a magnetic field.
Ian Spielman , Atomic Physics Division, NIST and NIST/UMD Joint Quantum Institute.
Physics Building, Room B145. (NIST Contact: Gail Newrock, 301-975-3200, gail.newrock@nist.gov)

2:00 PM - ATOMIC PHYSICS DIVISION SEMINAR: Quantum Antidots: Spin-Resolved Transport and Quantum Structure
In two-dimensional electron systems, quantum antidots (ADs) are relatively unstudied in comparison to quantum dots. Where a quantum dot is essentially a 'valley' in a 2D potential landscape, an AD is a 'hill,' with circulating electronic states quantized by a perpendicular magnetic field due to the Aharonov-Bohm effect. When these states are coupled to current-carrying edge states in a quantum device, the AD serves as an electron interferometer, and so ADs are potentially important components of devices using quantum hall edge states (either integer or fractional) for coherent manipulation in solid state systems. I will describe some of the key features and potential applications of AD devices, and present the results of several recent experiments which probe the detailed quantum structure of AD states through spin-resolved measurements.
Lee Bassett , Cambridge University.
Physics Building, Room B145. (NIST Contact: Neil Zimmerman, 301-975-5887, neil.zimmerman@nist.gov)


3/25 -- WEDNESDAY

10:30 AM - ATOMIC PHYSICS DIVISION SEMINAR: Metallic nanoantennas for field-enhanced spectroscopy and microscopy: from visible to terahertz
Optical nanoantennas have shown their potential in field-enhanced visible spectroscopies such as surface-enhanced Raman spectroscopy. We extend this enhancement by these nanoantennas into the infrared by using a resonant plasmon-vibration coupling. We obtain direct surface-enhanced IR absorption spectral information of a few thousand molecules deposited on the antenna. Furthermore, we apply a metallic tip acting as an antenna to resolve the near-field information of nanoscale metallic particles in the IR, allowing for a resolution of lambda/1000. Finally, using terahertz radiation with these antenna tips, we obtain quantitative information on the doping concentration of free carriers in state-of-the-art semiconductor devices.
Javier Aizpurua , Donostia International Physics Center, San Sebastian, Spain.
Physics Building, Room B145. (NIST Contact: Garnett Bryant, 301-975-2595, garnett.bryant@nist.gov)

10:30 AM - PRECISION ENGINEERING DIVISION SEMINAR: Modeling the SEM for Dimensional Metrology
John Villarrubia , Precision Engineering Division, NIST.
Bldg 219, Rm. A045. (NIST Contact: John Kramar, 301-975-3447, john.kramar@nist.gov)


3/26 -- THURSDAY

No Scheduled Events

3/27 -- FRIDAY

10:30 AM - POLYMERS DIVISION SEMINAR: Dynamics of Escherichia Coli Propagation, Biofilm Formation and Evolution
Alison Kraigsley , University of Southern CA..
224 Bldg, Rm. A312. (NIST Contact: Marc Cicerone, 301-975-8104, marcus.cicerone@nist.gov)

1:30 PM - CNST NANOFABRICATION RESEARCH GROUP SEMINAR: Near-field Characterization of the Nanophotonic Devices
The field of nanophotonics is rapidly growing and has a lot of promises in the all-optical signal processing and data transmission as well as in biological and chemical applications such as sensing and material analysis. Experimental characterization of nanophotonic components and devices is an important step in concept verification and fabrication validation. Subwavelength resolution and access to evanescent fields delivered by Near-field Scanning Optical Microscopy (NSOM) will be indispensable for such characterization. NSOM combined with heterodyne detection (HNSOM) has the capability to measure both optical amplitude and phase distributions and thus provides more detailed characterization of the nanodevices. In this talk, several examples of near-field characterization of nanophotonic devices based on the Photonic Crystal and metamaterial concepts will be presented. Also HNSOM technique with spectrally broad sources allowing characterization of the dispersive properties (group refractive index) will be described.
Maxim Abashin , PhD Candidate (graduate student)/ Research Assistant.
Bldg. 217, Rm. H107. (NIST Contact: James Alexander Liddle, 301-975-6050, james.liddle@nist.gov)


ADVANCE NOTICE

3/30/09 11:00 AM - MSEL SUSTAINABILITY SEMINAR SERIES: EPA's Resource Conservation Challenge: Fostering Sustainable Materials Management
EPA's Resource Conservation Challenge (RCC) is a national effort to conserve resources and energy and reduce greenhouse gas emissions by managing materials more efficiently and effectively. The focus of the RCC is on four priority areas: (1) municipal solid waste reuse/recycling (2) electronics and green building, (3) industrial materials reuse and recycling and (4) priority chemicals reduction. Sustainable materials management is central to furthering the goals of the RCC. More specifically, these goals include: reducing waste generation by increasing reuse and recycling; reducing or eliminating toxic contaminants; and conserving resources and saving energy. Standards, specifications, and certifications continue to play an essential role in fostering sustainable materials management. EPA's Office of Resource Conservation and Recovery (ORCR) also is actively involved in reviewing products from external standard-setting organizations and certification programs (e.g. ASTM, ASHRAE, USGBC), helping to harmonize State pavement specifications on industrial materials recycling, tracking the development of green highway rating and certification systems, and examining ways to clarify green product standards. This presentation will include an overview of RCC program goals, priorities, and benefits; highlight EPA's work with standard-setting organizations to promote effective materials management (e.g., our Responsible Recycling Practices for electronics recyclers, and our green highways work); and engage the audience in a dialogue on how EPA's ORCR can continue to collaborate with NIST. About the Speaker: Dr. Peter Grevatt is the Director of the Resource Conservation and Sustainability Division within EPA's RCRA Office. Peter is responsible for providing national leadership on EPA's sustainable materials management programs, with a focus on energy savings, greenhouse gas reductions, toxic chemical reductions and resource conservation achievable through reuse and recycling of municipal and industrial waste materials. Positions Peter has held previously at EPA include Chief of the national water quality monitoring program, Senior Science Advisor for EPA's waste cleanup programs, and Senior Health Scientist in EPA's Region 2 office in New York. Peter earned his Ph.D. in environmental health from New York University Medical Center and his B.A. in Biology from Earlham College.
Peter Grevatt , Director, Resource Conservation and Sustainability Division, U.S. EPA, Washington, DC, Grevatt.Peter@epamail.epa.gov.
Administration Bldg, Employees Lounge. (NIST Contact: Winnie Wong-Ng, 301-975-5791, winnie.wong-ng@nist.gov)

4/1/09 9:00 AM - CENTER FOR NANOSCALE SCIENCE AND TECHNOLOGY SEMINAR: DC Regional Meeting of the AVS Mid-Atlantic Chapter and Open House of the NIST Center for Nanoscale Science and Technology
NIST staff, AVS members, potential members, and students and postdocs who are working in nanoscience are invited to a joint regional meeting of the Mid-Atlantic Chapter of the AVS and an Open House of the NIST Center for Nanoscale Science and Technology (CNST). The meeting will feature invited speakers on local nanoscience research, information on how to become a facilities user at CNST, a tour of the NIST Nanofabrication Facilities, and a poster session for students and postdocs working in nanoscience.
Advanced registration required by , March 18, 2009.
Building 215, Room C103. (NIST Contact: Jay Hendricks, 301-975-4836, jay.hendricks@nist.gov) http://www2.avs.org/chapters/midatlantic

4/14/09 9:00 AM - COMPUTER SECURITY DIVISION SEMINAR: 8h Symposium on Identity and Trust on the Internet
This year's annual symposium is more engaging and valuable than ever. We have panels that approach the questions of the day from diverse viewpoints. Topics include responding to the recent practical attacks on browser security and CAs that use md5 hashes; application-specific concerns; and the various alternatives for authentication, federation, authorization, and attribute management. Keynote presentations will come from security and systems wizard Peter Neumann of SRI, and from Dan Blum, identity guru at the Burton Group, who has just finished a major independent review of Federal Identity Management Programs. And of course as always we have cutting-edge researchers presenting new peer-reviewed papers on a wide variety of topics. Come, network with your colleagues, and consider bringing your own short talk for the Rump session.
Dan Blum , Burton Group. Peter Neumann , SRI International.
Administration Bldg, Green Auditorium. (NIST Contact: Sara Caswell, 301-975-4634, sara@nist.gov) http://middleware.internet2.edu/idtrust/2009/

4/27/09 12:00 PM - OPTICAL TECHNOLOGY DIVISION SEMINAR: Spectrophotometry Workshop
The Spectrophotometry Workshop, sponsored by the Optical Technology Division at NIST, targets engineers, scientists, technicians, managers, or others involved in the design or use of optical instrumentation, optical testing, or physical sciences in which optical properties of materials are important. The format of the workshop includes lectures and closely-related laboratory exercises. The purpose of the workshop is to familiarize the students with the fundamentals of science and technology related to the accurate measurement of optical properties of materials. Upon completion of the workshop, the student should have a good understanding of the theory and practice of spectrophotometry using dispersive and Fourier-transform techniques, as well as optical scatterometry. Particular emphasis is placed on the evaluation of uncertainties in transmittance, reflectance, and Bidirectional Reflectance Distribution Function (BRDF) measurements. To register, go to http://www.nist.gov/public_affairs/confpage/090427.htm and follow the instructions.
Simon Kaplan , Physicist. David W. Allen, Thomas A. Germer, Leonard M. Hannsen, Maria E. Nadal, Eric L. Shirley, Howard W. Yoon
Metrology Building, Room B343. (NIST Contact: Simon Kaplan, 301-975-2336, simon.kaplan@nist.gov) http://physics.nist.gov/Divisions/Div844/spsc.html

4/30/09 10:30 AM - CNST NANOFABRICATION RESEARCH GROUP SEMINAR: Materials Challenges in Nanostructured ZnO-Conjugated Polymer Photovoltaic Devices
It has been widely recognized that increasing the sources of clean energy is absolutely critical for maintaining living standards while halting environmental degradation. Solar energy holds a great promise as a clean energy source, but current technologies are too expensive for wide usage. In addition to traditional semiconductor solar cells, organic photovoltaics (OPVs) have been targeted for inexpensive, lightweight applications, such as consumer electronics and field deployable sensors. A subset of OPVs, called hybrid solar cells, uses a wide bandgap oxide semiconductor as the electron acceptor. They take advantage of the environmental stability and high electron mobilities of metal oxide semiconductors, while largely retaining the solution-based processing available to organic semiconductor devices. In addition, the use of ordered nanostructures increases the area of the heterojunction, resulting in increased dissociation of photogenerated excitons and collection of charges. We focus on nanostructured ZnO – polythiophene (P3HT) heterojuctions. The challenges are to form oxide nanostructures with spacings that match the exciton diffusion length in conjugated polymers (~ 10 nm), to infiltrate high-molecular weight polymer in the dense oxide matrix, and to achieve efficient charge transfer at the heterojunction interface. In this talk, I will discuss progress made on each of the challenges and discuss future directions.
Julia W. P. Hsu , Sandia National Laboratories.
Bldg. 217, Rm. H107. (NIST Contact: Nikolai Zhitenev, 301-975-6039, nikolai.zhitenev@nist.gov)

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MEETINGS ELSEWHERE


3/23 -- MONDAY

11:00 AM - CARNEGIE INSTITUTION OF WASHINGTON/GEOPHYSICAL LAB. SEMINAR: BIOGEOCHEMICAL TRANSFORMATIONS OF HYDROTHERMALLY-SOURCED IRON AT THE MID-OCEAN RIDGE
B. Toner , Univ. of Minnesota.
Bldg, Rm..
Greenewalt Bldg., GL-DTM Grounds, Carnegie Institution of Washington, DC. (NIST Contact: D. Foustoukos, 202-478-8900, seminar@lists.ciw.edu)



3/24 -- TUESDAY

6:30 PM - LIGHT MEASUREMENT STANDARDS AND EFFICIENT LED LIGHTING
This lecture/meeting is sponsored by the local section of the Optical Society of America and the UM OSA/SPIE Student Chapter. There will be a social hour and light refreshments at 6:00 p.m., and the lecture will be at 6:30 p.m. at the University of Maryland. After the lecture, we will host Dr. Ohno at Siri's Chef's Secret Restaurant at 5810 Greenbelt Road, Greenbelt, MD. The lecture and dinner are open to all.
Yoshi Ohno , NIST, Gaithersburg, MD.
Bldg, Rm..
Room 1114 (Pepco Room), Jeong H. Kim Building, University of Maryland. (NIST Contact: Martin Lahart, 301-951-7095, Mjlahart@aol.com)



3/25 -- WEDNESDAY

No Scheduled Events

3/26 -- THURSDAY

No Scheduled Events

3/27 -- FRIDAY

No Scheduled Events

ADVANCE NOTICE

No Scheduled Events

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TALKS BY NIST PERSONNEL

MIGDALL, A. : FIBER BASED ENTANGLED PHOTON SOURCES AND THEIR APPLICATIONS.
Optical Fiber Communication Conference, San Diego Convention Center, San Diego, CA, 2/23.

MILLS, K. : MEASUREMENT SCIENCE FOR COMPLEX INFORMATION SYSTEMS.
AOL Network Architecture Group, AOL Campus Dulles, Virginia USA, 3/18.

RALCHENKO, Y. : "HOT" ATOMIC PHYSICS AT NIST.
J Phys B Editorial Board Meeting, IOP Publishing, London, UK, 3/20.

CURRY, J. : RADIATIVE TRANSITION PROBABILITIES FOR NEUTRAL CERIUM.
16th International Conference on Atomic Processes in Plasmas, Monterey, CA, 3/23.

MIGDALL, A. : FIBER BASED ENTANGLED PHOTON SOURCES AND THEIR APPLICATIONS.
Optical Fiber Communication Conference, San Diego Convention Center, San Diego, CA, 3/24.

RICHTER, L. : NONLINEAR OPTICAL STUDIES OF POLYMER INTERFACES.
American Chemical Society, National Meeting & Exposition, Salt Lake City, Utah, 3/24.

WALKER, M. : OLIGO(ETHYLENE OXIDE)-BASED COMPOUNDS FOR THE CONTROL OF PROTEIN ADSORPTION.
American Chemical Society, National Meeting & Exposition, Salt Lake City, Utah, 3/24.

LIN-GIBSON, S. : MONITORING OF ELONGATION AND ORIENTATION OF OSTEOBLAST CELLS DIRECTED BY ANISOTROPIC NANOPATTERNS.
American Chemical Society Spring Meeting, Salt Lake City, UT, 3/24.

LIN-GIBSON, S. : COMBINATORIAL CHARACTERIZATION OF PHOTOPOLYMERIZABLE NANOCOMPOSITES.
American Chemical Society Spring Meeting, Salt Lake City, UT, 3/25.

GERMACK, D. : CORRELATION OF INTERFACIAL COMPOSITION AND BULK MORPHOLGY TO DEVICE PERFORMANCE IN ORGANIC BULK HETEROJUNCTION SOLAR CELLS.
American Chemical Society Meeting, Salt Lake City, UT, 3/25.

MARX, E. : INTEGRAL EQUATIONS FOR 3-D SCATTERING: FINITE STRIP ON A SUBSTRATE.
PIERS 2009, Beijing, China, 3/25.

MITCHELL, W. : THE HP-MULTIGRID METHOD APPLIED TO HP-ADAPTIVE FINITE ELEMENTS.
14th Copper Mountain Conference on Multigrid Methods, Copper Mountain, CO, 3/25.

MARX, E. (Co-Author: J.Potzick , NIST, potzick@nist.gov) : COMPUTATIONAL PARAMETERS IN SIMULATION OF MICROSCOPE IMAGES.
PIERS 2009, Beijing, China, 3/25.

ANTONUCCI, J. : EFFECTS OF A METHACRYLICSILANE ON SOME PHYSICOCHEMICAL PROPERTIES OF RESIN-BASED BIOMIMETRIC COMPOSITES.
American Chemical Society Spring Meeting, Salt Lake City, UT, 3/26.

KLINE, R. : STRUCTURE PROPERTY RELATIONSHIPS TO ENABLE ORGANIC PHOTOVOLTAICS.
German Physical Society Spring Meeting, Dresden, Germany, 3/26.

MILLS, K. : MEASUREMENT SCIENCE FOR COMPLEX INFORMATION SYSTEMS.
GMU C4I Center and Computer Science Department, Science & Technology II building, Room 320 George Mason University Fairfax, VA, 3/27.

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ANNOUNCEMENTS

VISITOR REGISTRATION FOR NIST EVENTS
Because of heightened security at the NIST Gaithersburg site, members of the public who wish to attend meetings, seminars, lectures, etc. must first register in advance. For more information please call or e-mail the "NIST Contact" for the particular event you would like to attend.
NIST Contact: . ., ., .

PUBLICATIONS PRINTING DEADLINE AUGUST 14, 2009
August 14 is the last day in FY 2009 to submit materials using FY 2009 funds to the Electronic Information and Publications Group (EIPG) for printing at the Department of Commerce or Government Printing Office. To assure timely processing, bring your Editorial Review Board-approved document or administrative printing job and appropriate paperwork to the EIPG office by close of business on Friday, August 14, 2009. The office is located on the mezzanine floor of the NIST Research Library in the Administration Building, Room E220. Questions? Ilse Putman, x2780 or Barbara Silcox, x2146.
NIST Contact: Ilse Putman, 301-975-2780, ilse.putman@nist.gov

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NIST WEB SITE ANNOUNCEMENTS

No Web Site announcements this week.

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For more information, contact Ms. Sharon Hallman, Editor, Stop 2500, National Institute of Standards and Technology, Gaithersburg MD 20899-2500; Telephone: 301-975-TCAL (3570); Fax: 301-926-4431; or Email: tcal@nist.gov.

All lectures and meetings are open unless otherwise stated.

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