NIST Technicalendar February 12 to February 16, 2007 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/.
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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

1:00 PM - Current Status of Clinical Breath Analysis
2:00 PM - A Context Aware Perioperative Information System
3:00 PM - Measurement advances for identifying chemically amplified photoresist materials limits

No Scheduled Events

10:30 AM - Tagging of Single Barium Ions in Liquid and Solid Xenon with Lasers
10:45 AM - Raman Scattering Study on Quantum Ferroelectric 18O-exchanged SrTiO3

10:30 AM - Ultrafast Protein Folding

2/12 -- MONDAY

No Scheduled Events

2/13 -- TUESDAY

1:00 PM - PROCESS MEASUREMENTS DIVISION SEMINAR: Current Status of Clinical Breath Analysis
Terence Risby , Johns Hopkins University.
221 Bldg, Rm. A366. (NIST Contact: Steve Semancik, 301-975-2606, steves@nist.gov)

2:00 PM - MANUFACTURING SYSTEMS INTEGRATION DIVISION SEMINAR: A Context Aware Perioperative Information System
Tim Finin , University of Maryland @ Baltimore County. Anupam Joshi Yelena Yesha
Metrology Building (220), Rm. B105. (NIST Contact: Beverly Kephart, 301-975-5777, bkephart@cme.nist.gov)

3:00 PM - POLYMERS DIVISION SEMINAR: Measurement advances for identifying chemically amplified photoresist materials limits
The dissolution of partially deprotected chemically amplified photoresists is the final step in printing lithographic features. Since this process step can be tuned independently from the design of the photoresist chemistry, measurements of the dissolution behavior of photoresists may provide needed insights towards improving line-edge roughness (LER). The residual swelling fraction (RSF) is the remaining photoresist that swells rather than dissolves in a lithographically printed feature. The latent-image shape, photoresist chemistry and composition, photoacid concentration, nanoscale deprotection morphology, and aqueous hydroxide developer properties contribute to the RSF. One measurement challenge is quantifying the RSF spatial extent at the line-edge. Contrast variant neutron reflectivity and quartz crystal microbalance methods were developed and applied to quantify the nanometer-scale spatial distribution of resist and aqueous base developer near a developed model line edge. The main results regarding model 193 nm photoresists will be presented as well as predictions tested by 193 nm photolithography if time permits.
Vivek Prabhu , NIST.
224, Polymers Bldg, Rm. A312CR. (NIST Contact: Jan Obrzut, 301-975-6845, jano@nist.gov)


2/14 -- WEDNESDAY

No Scheduled Events

2/15 -- THURSDAY

10:30 AM - EPG SEMINAR SERIES: Tagging of Single Barium Ions in Liquid and Solid Xenon with Lasers
We are developing techniques to detect single 136Ba+ ions from rare neutrinoless double beta decay events (one in 5-10 years) in a large volume (1-10 tons) of liquid xenon-136. We are exploring two methods, direct fluorescence detection of single Ba+ ions in the liquid xenon and detection of single Ba+ ions in solid Xe on the end of an optical fiber. Our colleagues at Stanford are developing another method of grabbing and detecting the Ba+ ions in a linear ion trap. Progress on these methods will be reported.
William Fairbank, Jr. , Department of Physics, Colorado State University, Fort Collins, CO.
217 Bldg, Rm. H107. (NIST Contact: Jabez McClelland, 301-975-4675, jabez.mcclelland@nist.gov)

10:45 AM - NIST CENTER FOR NEUTRON RESEARCH SEMINAR: Raman Scattering Study on Quantum Ferroelectric 18O-exchanged SrTiO3
Quantum critical behavior has been one of central topics in condensed matter physics from both experimental and theoretical points of view. Among ferroelectric and related materials, SrTiO3 has been considered to be an important compound because its phase transition nature is dominated by a quantum effect. 18O-exchanged SrTiO3 shows quantum ferroelectric phase transition. Initially the ferroelectricity of pure SrTiO3 is suppressed by quantum fluctuation in a low temperature region near 0 K (quantum paraelectricity). When the 16O is exchanged by its isotope 18O, SrTiO3 becomes to undergo a ferroelectric phase transition at a finite temperature. The exchange rate dependence of Curie temperature is in good agreement with a theoretical prediction for quantum ferroelectricity. However, the mechanism is still unclear due to the lack of sufficient experimental results. The ferroelectric soft mode plays essential role in the system of SrTiO3. The quantum paraelectricity is understood by the suppression of the softening of the soft mode by zero-point vibration. Therefore, it is significant to investigate an isotope effect on the soft mode dynamics in order to understand the 18O-exchange induced quantum ferroelectricity of SrTiO3 correctly. In the present study, we perform Raman scattering experiment on 18O-exchanged SrTiO3 as a function of exchange rate. The result indicates that the quantum ferroelectricity is essentially driven by the softening of soft mode enhanced by 18O-exchange. The remarkable point is that, in the vicinity of quantum critical point (QCP), the softening behavior becomes strongly smeared and the soft mode presents incomplete softening in spite of the underdamped sharp spectral shape. This behavior is in clear contrast to classical incomplete soft mode which is coupled to a relaxational mode and therefore accompanied by a central component. The spectral analysis clarifies that the system goes into a novel paraelectric-ferroelectric phase coexistence state at QCP. Finally, new phase diagram is proposed on the basis of soft mode dynamics. An effect of inhomogeneity on the quantum ferroelectric phase transition is discussed simultaneously.
Hiroki Taniguchi , Tokyo Institute of Technology, Japan.
Bldg. 235, E100 (Large Conf. room). (NIST Contact: Peter Gehring, 301-975-3946, peter.gehring@nist.gov)


2/16 -- FRIDAY

10:30 AM - SYSTEMS BIOLOGY SEMINAR SERIES: Ultrafast Protein Folding
The introduction of laser-triggering methods and advances in computational capabilities are rapidly narrowing the historical gap between experimental protein folding kinetics and the time-scale accessible to atomistic molecular dynamics trajectories. It is now possible to rigorously test the validity of the mechanisms extracted from the analysis of multiple trajectories with experimental data from ultrafast folding proteins. Advances are also being made in the development of simple analytical models, which are surprisingly successful in calculating experimental properties of specific proteins. In this seminar I will discuss the connections between the equilibrium and kinetic data on the ultrafast-folding 35-residue subdomain from the villin headpiece and both atomistic simulations and a simple statisticalmechanical model.
William Eaton , Chief, Laboratory of Chemical Physics, NIDDK, NIH, Bethesda, MD.
Radiation Physics Bldg, Rm. C301. (NIST Contact: Charles Clark, 301-975-3709, charles.clark@nist.gov) http://physics.nist.gov/sbss
Special Assistance Available


ADVANCE NOTICE

2/22/07 1:30 PM - ITL SEMINAR SERIES: Data! How To Make It Be There When You Want It, And Make It Go Away When You Want It Gone
This talk describes a system that supports high availability of data, until the data should be expunged, at which time it is impossible to recover the data. This design supports three types of assured delete; expiration time known at file creation, on-demand deletion of individual files, and custom keys for classes of data. The obvious approach, of course, is to encrypt the data on nonvolatile storage, and then destroy keys at the appropriate times. However, managing ephemeral keys; robustly keeping them for some amount of time, and then reliably destroying every copy, is difficult. We partition the problem so that the burden of ephemeral key management can be out sourced to a minimally trusted third party we refer to as an “ephemerizer”, with negligible performance overhead, resulting in a file system that is easy and inexpensive to manage. Bio: Radia Perlman is a Sun Fellow at Sun Microsystems, working on network and security protocols.She invented many of the basic algorithms that make today's network infrastructure robust and scalable. She is author of "Interconnections: Bridges, Routers, Switches, and Internetworking Protocols", and coauthor of "Network Security: Private Communication in a Public World", both of which are widely used both as textbooks in universities and for engineers to learn the field. She holds over 80 patents, a PhD in computer science from MIT, and an honorary doctorate from KTH, the Royal Institute of Technology, Sweden. She recently was given a lifetime achievement award by Usenix, and named SVIPLA (Silicon Valley Intellectual Property Law Association) Inventor of the year.
Dr. Radia Perlman , Fellow, Sun Microsystems Laboratories .
Building 215, AML, Room C103. (NIST Contact: Larry Reeker, 301-975-5147, larry.reeker@nist.gov)

3/2/07 10:30 AM - SYSTEMS BIOLOGY SEMINAR SERIES: Sequence-Resolved Detection of Pausing by Single RNA Polymerase Molecules
We apply an ultrastable optical-trapping assay to follow the motion of individual molecules of RNA polymerase (RNAP) transcribing templates engineered with repeated sequences carrying imbedded, sequence-specific pause sites of known regulatory function. Both the known and ubiquitous pauses appeared at reproducible locations, identified with base-pair accuracy. Ubiquitous pauses were associated with DNA sequences that show similarities to regulatory pause sequences. Data obtained for the lifetimes and efficiencies of pauses support a model where the transition to pausing branches off of the normal elongation pathway and is mediated by a common elemental state, which corresponds to the ubiquitous pause. This result complements single-molecule studies,which showed that bacterial RNAP pauses frequently during transcriptional elongation; our results clarify the relationship of these 'ubiquitous' pauses to the underlying DNA sequence.
Arthur LaPorta , Dept. of Physics and Institute for Physical Science and Technology, University of Maryland, College Park, MD.
Radiation Physics Bldg, Rm. C301. (NIST Contact: Charles Clark, 301-975-3709, charles.clark@nist.gov) http://physics.nist.gov/sbss
Special Assistance Available

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MEETINGS ELSEWHERE


2/12 -- MONDAY

No Scheduled Events

2/13 -- TUESDAY

4:15 PM - THE JOHNS HOPKINS UNIV. CHEMISTRY DEPT/ EPHRAIM AND WILMA SHAW ROSEMAN COLLOQUIUM SERIES: MORPHING NATURAL ARCHITECTURES INTO SIMPLIFIED METAL COMPLEXES: FROM METALLO-NUCLEIC ACIDS TO METALS IN PROTEIN KINASE INHIBITORS
E. Meggers , Univ. of Pennsylvania.
Bldg, Rm. .
Chemistry Dept., The Johns Hopkins Univ., Baltimore, MD. (NIST Contact: R. Elder, 410-516-7432, rosalie@jhu.edu)



2/14 -- WEDNESDAY

No Scheduled Events

2/15 -- THURSDAY

No Scheduled Events

2/16 -- FRIDAY

No Scheduled Events

ADVANCE NOTICE

No Scheduled Events

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TALKS BY NIST PERSONNEL

GILLEN, G. : IMAGING MASS SPECTROMETRY AT NIST.
Texas A & M Chemistry Department, Dallas, Texas, 2/13.

HENDLER, R. : MEMBRANE LIPID CONTROL OF CONFORMATION AND ACTIVITY OF THE ENERGY-TRANSDUCING PROTON PUMP, BACTERIORHODOPSIN, AND A NEW MULTI-DISCIPLINARY APPROACH TO THE STUDY OF ACTIVE MEMBRANE PROTEINS.
Biochemical Science Division, CSTL, CARB II, Rockville, MD, 2/13.

GILLEN, G. : INKJET PRINTING TECHNOLOGY AND NIST.
Microfab Technologies Inc., Plano, Texas, 2/14.

NAVE, G. (Co-Authors: C.Sansonetti , N.I.S.T., Gaithersburg, MD, craig.sansonetti@nist.gov F.Kerber , European Southern Observatory, Garching, fkerber@eso.org) : REFERENCE WAVELENGTHS OF THORIUM AND ARGON FOR THE CALIBRATION OF INFRARED ASTRONOMICAL SPECTROGRAPHS.
Optical Society of America topical meeting on Fourier transform spectroscopy, Santa Fe, NM, 2/14.

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ANNOUNCEMENTS

14TH ANNUAL POST-DOCTORAL POSTER PRESENTATION
The NIST Chapter of Sigma Xi cordially invites all staff members to visit the poster presentations by current NIST Post-Doctoral Research Associates and Guest Researchers on Friday, February 16, 2007 in Lecture Rooms A and B and the Hall of Flags from 11 am - 3 pm. Please come and welcome our new Post-Docs and Guest Researchers and learn about their exciting research. Refreshments will be served. To preview all the abstracts, please visit our web site at http://www.nist.gov/sigmaxi and click on the 14th PPP.
NIST Contact: Barbara C. Levin, 301-975-6682, barbara.levin@nist.gov

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: . ., ., .

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NIST WEB SITE ANNOUNCEMENTS

SOURCE CODE SECURITY ANALYZERS
A source code security analyzer finds weaknesses in source code that can lead to security vulnerabilities. This web site lists dozens of such tools and has a draft specification, SP 500-268, which is now open for comment.
NIST Contact: Paul E. Black, 301-975-4794, paul.black@nist.gov

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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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