NIST Technicalendar Online

	NIST Technicalendar September 10 to September 14, 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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AT A GLANCE - MEETINGS AT NIST
MONDAY - 9/10

11:00 AM - STUDY OF DRAG REDUCING POLYMERS AND MECHANISMS OF THEIR INTRAVASCULAR EFFECT
1:15 PM - Physical and Optical Properties of Single-Walled Carbon Nanotubes From "Single-Molecule" Near-Infrared Fluorescence Microscopy Measurements

TUESDAY - 9/11

10:30 AM - Spin and Charge Transport through Carbon-based Systems
11:00 AM - Single-proton, Double-proton, and Alpha emissions from 14O+Alpha reactions
11:00 AM - From Quantum Mechanics to Standards for Temperature, Pressure, Humidity, and Gas Flow

WEDNESDAY - 9/12

No Scheduled Events

THURSDAY - 9/13

10:30 AM - Atom Trap, Krypton-81, and Saharan Water
10:30 AM - Arsenic in Drinking Water: Aquatic Chemistry and Mitigation through a Sustainable Filtration Technology
3:00 PM - Sensors and Molecular Imaging Agents for Breast Cancer Diagnosis and Therapy

FRIDAY - 9/14

10:00 AM - Life in the Green Zone: NIST's detailee to the Iraq Reconstruction Management Office (IRMO) at Embassy Baghdad talks about his year in Iraq

MEETINGS AT NIST
9/10 -- MONDAY

11:00 AM - POLYMERS DIVISION SEMINAR: STUDY OF DRAG REDUCING POLYMERS AND MECHANISMS OF THEIR INTRAVASCULAR EFFECT
Blood-soluble drag reducing polymers (DRPs) have been shown to produce significant beneficial effects on blood circulation, including an increase in tissue perfusion and tissue oxygenation and a decrease in vascular resistance, when injected in blood at minute concentrations in various animal models of normal and especially pathological circulation. DRPs have potential applications in treating tissue hypoperfusion caused by cardiovascular disease, stroke, peripheral vascular disease, diabetes, and other illnesses. To help to translate this novel therapy from the lab bench to the clinic, effective, biocompatible polymers which can be easily produced must be identified. Furthermore, elucidation of the mechanisms of their observed effects on blood circulation is extremely important for future medical applications of DRPs
Joie Marhefka , PhD. Bio - Engineering, Pittsburgh, PA, marhefkaj@upmc.edu.
224 Bldg, Rm. A312. (NIST Contact: Kalman Migler, 301-975-4876, kalman.migler@nist.gov)

1:15 PM - POLYMERS DIVISION SEMINAR: Physical and Optical Properties of Single-Walled Carbon Nanotubes From "Single-Molecule" Near-Infrared Fluorescence Microscopy Measurements
Fluorescence from semiconducting single-walled carbon nanotubes has become an exceptionally powerful and inexpensive tool to determine (n,m)-distributions in highly heterogeneous SWNT suspensions. Observing individual nanotubes presents a number of advantages over the bulk methods of characterization, since it allows access to each individual nanoparticle to reveal its intrinsic physical and optical properties. In this presentation, a number of research directions which originated from our ability to “see” isolated SWNTs will be described. Sub-diffraction SWNT lengths can be determined by analyzing their translational and rotational dynamics in solution. Observing nanotube’s bending dynamics allows measuring the persistence length of individual SWNTs as a function of their diameter. Quantifying the absolute photoluminescence intensity from particular nanotube species provides information on absorptivities and intrinsic fluorescence quantum yields of each (n,m)-structure. SWNTs immobilized in polymeric matrices or gels offer new directions to explore. For instance, within a tight-binding (TB) theoretical framework it has been predicted that nanotube’s emission maxima shift proportionally to strain, yet no experimental report has been able to demonstrate satisfactory agreement with this theory. Our experimental observations of emission maxima from SWNTs embedded in polymethylmetacrylate film for the first time show a close match with a TB model. Finally, I will also report on our most recent achievements on detecting individual molecular reactions occurring at a nanotube’s sidewalls, and far-field optical imaging of individual SWNTs with sub-wavelength resolution in unprecedented detail.
Dr. Dmitri A. Tsyboulski , Dept. of Chemistry, Richard E. Smalley Institute for Nanoscale Science and Technology, Rice Univ, Houston, TX.
Polymer Building, Room A312. (NIST Contact: Erik Hobbie, 301-975-6774, erik.hobbie@nist.gov)

9/11 -- TUESDAY

10:30 AM - CENTER FOR NANOSCALE SCIENCE AND TECHNOLOGY SEMINAR: Spin and Charge Transport through Carbon-based Systems
We investigate spin-dependent transport through ferromagnet-contacted single-walled carbon nanotubes(SWCNTs), in which charge transport shows the Fabry Perot (FP) interference effect,the Kondo effect, and the Coulomb blockade effect at low temperatures. Hysteric magnetoresistance(MR) is observed in all three transport regimes, which can be controlled by both the external magnetic field and the gate voltage. The MR in the FP interference regime can be well understood by a model considering the intrinsic electronic structure of SWCNTs and the quantum interference effect. In the strongly interacting Kondo regime, the Kondo effect is not suppressed by the presence of nearby ferromagnetism, and several observed MR features including the non-splitted zero-bias Kondo peak and positive MR switching at zero bias can be explained by the strong Kondo effect and weak ferromagnetism in the leads. In the Coulomb blockade regime, several effects that can be associated with the magneto-Coulomb effect have been observed, and isolated spin accumulation and transport through the SWCNT quantum dot have been realized by a four-probe non-local measurements. We also studied charge transport behavior through organic semiconductor pentacene thin film transistors (OTFTs) in the limit of single-or a few molecular layers of pentacene films. The charge transport in these devices can be well explained by the multiple trapping and release model. The structural disorders induced by the physical and chemical causes, such as grain boundaries, interactions with gate insulator, metal contacts and ambient conditions can be responsible for the localized trap states in the ultrathin layer OTFTs, which are further confirmed by the electric force microscopy (EFM) measurements.
Suyong Jung , Department of Physics, The University of Texas at Austin, .
Bldg. 217, Rm. H107. (NIST Contact: Nikolai Zhitenev, 301-975-6039, nikolai.zhitenev@nist.gov)

11:00 AM - IONIZING RADIATION DIVISION SEMINAR: Single-proton, Double-proton, and Alpha emissions from 14O+Alpha reactions
Changbo Fu , Research Associate, Texas A&M University.
245 Bldg, Rm. B105. (NIST Contact: Thomas Gentile, 301-975-5431, thomas.gentile@nist.gov)

11:00 AM - PROCESS MEASUREMENTS DIVISION SEMINAR: From Quantum Mechanics to Standards for Temperature, Pressure, Humidity, and Gas Flow
Michael Moldover , Fluid Metrology Group (836.02).
221 Bldg, Rm. A366. (NIST Contact: Michael Moldover, 301-975-2459, mmoldover@nist.gov)

9/12 -- WEDNESDAY

No Scheduled Events

9/13 -- THURSDAY

10:30 AM - ATOMIC PHYSICS DIVISION SEMINAR: Atom Trap, Krypton-81, and Saharan Water
Since radiocarbon dating was first demonstrated in 1949, the field of trace analyses of long-lived cosmogenic isotopes has seen steady growth in both analytical methods and applicable isotopes. The impact of such analyses has reached a wide range of scientific and technological areas. A new method, named Atom Trap Trace Analysis (ATTA), was developed by our group and used to analyze 81Kr (t1/2 = 2.3?105 years, isotopic abundance ~ 1?10-12) in environmental samples. In this method, individual 81Kr atoms are selectively captured and detected with a laser-based atom trap. 81Kr is produced by cosmic rays in the upper atmosphere. It is the ideal tracer for dating ice and groundwater in the age range of 104–106 years. As the first real-world application of ATTA, we have determined the mean residence time of the old groundwater in the Nubian Aquifer located underneath the Sahara Desert. Moreover, this method of capturing and probing atoms of rare isotopes is also applied to experiments that study exotic nuclear structure and test fundamental symmetries.
Zheng-Tian Lu , Physics Division, Argonne National Laboratory.
Physics Building, Room B145. (NIST Contact: Joseph Reader, 301-975-3222, jreader@nist.gov)

10:30 AM - ,NIST CHAPTER OF SIGMA XI SEMINAR: Arsenic in Drinking Water: Aquatic Chemistry and Mitigation through a Sustainable Filtration Technology
The presence of toxic levels of arsenic in the groundwater of Bangladesh and in many parts of the world is now known to cause serious health problems. Arsenic is primarily present as inorganic forms: H2AsO4-, HAsO42- and H3AsO3, where arsenite is the most toxic species. This talk will cover the aquatic chemistry of these species in terms of distribution, pH, redox chemistry, dissolved oxygen, and computational chemical equilibria with temporal water chemistry data obtained in Bangladesh. The complex phenomena of natural attenuation of arsenic and other inorganic species present in groundwater will be discussed with experimental data and computational chemical equilibria. These results were used to predict chemical mechanisms of arsenic mobilization. Finally, the chemistry of a simple and extremely efficient method for the filtration of arsenic species from groundwater will be discussed. The method uses a composite iron matrix as the arsenic scavenger material. This presentation will cover the present crisis of clean drinking water in Bangladesh and its possible solution through the development of an indigenous filtration technology. Abul Hussam, is a Professor in the Department of Chemistry and Biochemistry at George Mason University, where he teaches quantitative chemical analysis, instrumental analysis, electroanalytical chemistry and the theory of analytical processes. His research areas involve electroanalytical chemistry, environmental chemistry, and chemistry in organized media. His early scientific work was centered on electrochemistry in nonaqueous media, spectroscopic (NMR and FTIR) characterization of hydrogen bonded water, and diffusion behavior of micelles and microemulsions. In 2007 he was awarded the Grainger Challenge Prize for Sustainability from the US National Academy of Engineering for the development and deployment of a novel wate filter to remove toxic arsenic species from groundwater. This filter is now used by thousands of people in the affected areas of Bangladesh.
Professor Abul Hussam , George Mason University, Fairfax, VA.
Administration Bldg, Lecture Rm. A. (NIST Contact: Bryant Nelson, 301-975-2517, bryant.nelson@nist.gov)

3:00 PM - POLYMERS DIVISION SEMINAR: Sensors and Molecular Imaging Agents for Breast Cancer Diagnosis and Therapy
Michael McDonald , Posdoctoral Fellow / NIH, Bethesda, MD, mamcdona77@yahoo.com.
Polymers Building 224, Rm. A312. (NIST Contact: Marc Cicerone, 301-975-8104, cicerone@nist.gov)

9/14 -- FRIDAY

10:00 AM - STANDARDS SERVICES DIVISION SEMINAR: Life in the Green Zone: NIST's detailee to the Iraq Reconstruction Management Office (IRMO) at Embassy Baghdad talks about his year in Iraq
David Karmol , Standards Advisor to Iraq, Gaithersburg, MD, david.karmol@nist.gov.
222 Bldg, Rm. B229. (NIST Contact: Kelsey Burns, 301-975-2918, kburns@nist.gov)

ADVANCE NOTICE

9/17/07 1:30 PM - COMPLEX SYSTEMS LECTURE SERIES, COMPLEX SYSTEMS PROGRAM OF ITL: 40 Years of Internet Security: Are We There Yet?
The third character ever transmitted on the Arpanet crashed the server. The Morris worm infected thousands of computers in 1988. Now infections are so widespread they are studied using the math of epidemics, or the economics of small countries. Where attacks used to be the domain of desperately anti-social teenagers seeking fame, the nuisances and very real threats today come from shady businesses and organized crime with distinct profit motives, and governments seeking information and advantage. Saltzer and Schroeder gave classic good security advice in 1975, but Sun and SGI seemed to ignore it in the 1980s and 1990s, and Microsoft certainly ignored it until 2001. Most of the attacks we seetoday rhyme with those of twenty years ago. Most of these problems (aside from a few DOS viruses) never seem to go away. We've built walled gardens so vast that it is sometimes unclear which side is outside. We've updated and patched countless billions of times, often replacing old bugs with new. How bad is it, really? Are we making progress? Which technologies are likely to be technically and economically feasible?
William Cheswick , AT&T Research , Florham Park, NJ.
Administration Bldg, Red Auditorium. (NIST Contact: Sandy Ressler, 301-975-3549, sandy.ressler@nist.gov)

9/21/07 10:30 AM - NIST COLLOQUIUM SERIES : Improving the Voting Process: A Multi-Disciplinary and Politicized Problem
The current problems with the voting process are presented in the context of the division of responsibilities between the federal and state governments. Developments beginning in the late 19th century are described, involving voting technology, improved ballot secrecy, and elimination of paper ballots because of extensive fraud. The difficulties resulting from the use of computing technology, beginning in the 1960s, such as fear of software fraud and ambiguity of results due to “hanging chads,” are elaborated. The ground-breaking NBS reports of 1975 and 1988 are reviewed for their recommendations and anticipation of present problems. Current issues include the questions of software correctness, testing of commercial off-the-shelf software, independent verification with and without paper trails, voter registration integrity, and partisanship at the highest levels of supposedly evenhanded administration.
Roy Saltman , Author and Alumnus, NIST Computer Systems Laboratory.
Administration Building, Red Auditorium. (NIST Contact: Kum Ham, 301-975-4203, kham@nist.gov)

Special Assistance Available

10/2/07 10:30 AM - ATOMIC PHYSICS DIVISION SEMINAR: Highlights in Quantum-Atom Optics in Australia
The ARC Centre for quantum-atom optics (ACQAO) combines the talent and resources of several teams across Australia. Recently we have made good progress with our experiments and theory in both the generation and use of laser beams with strong nonclassical properties and the control of matter waves, such as atom lasers. This talk will summarize some of the new results . Particular emphasis will be given to experiments on spatial multimode fields which allow novel tests of quantum mechanics as well as technology for spatial sensing and spatial quantum encoding beyond the conventional quantum noise limit.
Hans Bachor , Director ACQAO, Canberra, Australia, hans.bachor@anu.edu.au.
Physics Bldg. 221, Rm. B145. (NIST Contact: William Phillips, 301-975-6554, william.phillips@nist.gov)

MEETINGS ELSEWHERE

9/10 -- MONDAY

No Scheduled Events

9/11 -- TUESDAY

8:30 AM - BIOMETRIC CONSORTIUM CONFERENCE (BC2007)
The BC2007 is a multi-track conference that will address the latest trends in biometrics research, development and application on biometric technologies. This conference addresses the important role that biometrics can play in the identification and verification of individuals in this age of heightened security and privacy by examining biometric-based solutions for homeland security (airport security, travel documents, visas, border control, prevention of ID theft) as well as the utilization of biometrics in other applications such as point of sale and large-scale enterprise network environments.

The BC2007 is being held in conjunction with and co-located with the 2007 Biometrics Technology Expo hosted by AFCEA.
Dr. John Marburger, III , Science Advisor to the President and Director of the Office of Science and Technology Policy. Mr. David Wennergren , Deputy Asst Secretary of Defense for Information Mgmt, Integration & Technology and DoD Deputy CIO. The Honorable James W. Ziglar
President and Chief Executive Officer, Cross Match Technologies, Inc.

Featured DoD Speaker:
Mr. William Gravell
President, Diogenes Group LLC
Bldg, Rm. .

Baltimore Convention Center Baltimore, Maryland. (NIST Contact: Sara Caswell, 301-975-4634, bc2007info@nist.gov) http://www.nist.gov/bc2007

9/12 -- WEDNESDAY

No Scheduled Events

9/13 -- THURSDAY

No Scheduled Events

9/14 -- FRIDAY

No Scheduled Events

ADVANCE NOTICE

10/4/07 10:00 AM - NIST/DARPA WORKSHOP ON COMPACT X-RAY SOURCES BASED ON INVERSE COMPTON SCATTERING
Ronald Ruth , President and Chief Scientist, Lyncean Technologies, Inc.. David Moncton , Director, MIT Nuclear Reactor Laboratory. W.J. Brown, MIT Lincoln Laboratory, F.E. Carroll Jr, CEO & Chief Medical Officer, MXISystems, Inc., M. Richter, Physikalisch-Technische Bundesanstalt PTB, M.Bech, Swiss Light Source, PSI
Bldg, Rm. .
The Executive Conference Center (ECC), 3601 Wilson Boulevard, Suite 600, Arlington, Virginia 22201 . (NIST Contact: Uwe Arp, 301-975-3233, uwe.arp@nist.gov) http://physics.nist.gov/Divisions/Div841/Gp2/darpaWorkshop.html

TALKS BY NIST PERSONNEL

HENDRICKS, J. : NIST PRESSURE AND VACUUM GROUP LOW PRESSURE UIM MANOMETRY PROJECT: PROVIDING TRACEABILITY TO THE SI FROM 0.01 PA TO 360 KPA.
Invited Talk, Korea Research Institute of Standards and Science (KRISS), Daejeon, Rep. of Korea, 9/12.

WONG-NG, W. : PHASE RELATIONSHIPS OF THE COATED-CONDUCTOR BA-SM-Y-CU-O SYSTEM.
MS&T 07, Detroit, MI, 9/16.

VERKOUTEREN, J. : SAMPLING STUDIES TO IMPROVE TRACE EXPLOSIVES ANALYSIS.
Gordon Conference: Detecting Illicit Substances: Explosives and Drugs, Big Sky, MT, 9/16.

WONG-NG, W. : PHASE RELATIONSHIPS IN THE BA-R-CU-O (R=Y AND LANTHANIDES) FILMS.
MS&T 07, Detroit, MI, USA, 9/17.

KREIDER, K. : THIN-FILM PT RESISTANCE THERMOMETERS ON SI WAFERS.
AEC/APC Semitech Symposium, Indian Wells, CA, 9/18.

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: . ., ., .

NIST WEB SITE ANNOUNCEMENTS

No Web Site announcements this week.

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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