NIST Technicalendar June 24 to June 28, 2002 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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9:00 AM - Grants Manual Workshop
10:00 AM - Recent Developments in UML
10:30 AM - Recent Advances in Sample Introduction for Atomic Spectrometry

1:00 PM - Ionically Crosslinked Alginate Hydrogels as Scaffolds for Tissue Engineering
3:00 PM - The Craik-Criminale Class of Solutions to the Incompressible Navier-Stokes and Similar Equations

No Scheduled Events

10:00 AM - StarLight: A facility for Experimental Networks & e-Science Applications
10:30 AM - Symyx Technologies: An Overview of the Collaborations. Discovery Tools and IP Licensing Programs
1:30 PM - Miscibility Mediated Interdiffusion at Polymer Interfaces

3:00 PM - The Metallurgy of Shipwrecks: Titanic, Arizona and Hunley

6/24 -- MONDAY

9:00 AM - GRANTS AND AGGREEMENTS MANAGEMENT DIVISION SEMINAR: Grants Manual Workshop
DoC Staff presents Grants Manual Workshop at NIST.
Elizabeth Dorfman , DoC.
Administration Bldg, Lecture Rm. B. (NIST Contact: Jannet Cancino, 301-975-6544, jlc@nist.gov)

10:00 AM - MANUFACTURING SYSTEMS INTEGRATION DIVISION SEMINAR: Recent Developments in UML
Conrad Bock , Kabira Technologies, Menlow Park, Ca, conrad.bock@kabira.com.
Metrology 220 Bldg, Rm. AMSANT A108. (NIST Contact: Steven Ray, 301-975-3508, ray@nist.gov)

10:30 AM - ANALYTICAL CHEMISTRY DIVISION SEMINAR: Recent Advances in Sample Introduction for Atomic Spectrometry
Ian Brindle , Brook University Dean of Mathematics and Science, St. Catharines, Canada.
Building 227, Rm. A202. (NIST Contact: Stephen Long, 301-975-4101, stephen.long@nist.gov)


6/25 -- TUESDAY

1:00 PM - TISSUE ENGINEERING SEMINAR SERIES: Ionically Crosslinked Alginate Hydrogels as Scaffolds for Tissue Engineering
Generation of living tissues through tissue engineering can be achieved via incorporation of cells into synthetic scaffolds designed to facilitate new tissue formation. Necessary characteristics of a scaffold include biocompatibility, high porosity with controllable pore size, interconnected pore networks, moldability, chemical and mechanical stability, and structural homogeneity. For example, a tissue repair matrix must be permeable for exchange of nutrients and waste, but impermeable to immune cells that may harm allogenic cells. Such specific material property requirements can only be satisfied with a uniform structure in which pore size distribution is wellcontrolled. Hydrogels often possess many of the necessary characteristics and thus are favorable candidates for scaffolding. Alginate hydrogels are commonly made by ionically crosslinking with calcium ions from CaCl2 or CaSO4. These hydrogels are favored for their mild gel formation, however the gelation rate is rapid and uncontrollable (fast-gelation), resulting in varying crosslinking density throughout the gel. In this work, injectable, structurally homogeneous calcium alginate hydrogels were formed via a slow-gelation system that utilizes uniform mixing of CaCO3 with sodium alginate solution, and the addition of D-gluconic acid lactone to slowly release calcium ions for crosslinking. The homogeneity and mechanical properties of these hydrogels were characterized and shown to be superior to those of fast-gelled hydrogels. The gelation rate was controlled through the incorporation of CaSO4, and by varying total calcium content, polymer concentration and gelation temperature. Control over mechanical properties and diffusivity was demonstrated in the homogeneous hydrogels by adjusting compositional variables. To overcome the instability of ionically crosslinked gels in aqueous solutions, such as tissue culture medium, a method was developed to control the hydrogel dimensions by adjusting the ionic concentration of the aqueous environment. The stability of the hydrogels in this controlled environment was verified through swelling experiments and mechanical testing. To provide for scaffold degradation and thereby promote tissue growth, alginate lyase was incorporated into the hydrogel or the tissue culture medium to induce enzymatically controlled alginate degradation. The alginate hydrogel system presented here is novel in that cells are directly and uniformly incorporated into a hydrogel with controlled gelation rate and material properties. The injectable alginate hydrogels can easily be molded into complex shapes or injected into the body to avoid the need for invasive surgery. Further, the ability to tailor their gelation rate, material properties and degradation enable these alginate hydrogels to be used for a variety of biomedical applications including drug or biofactor delivery.
Catherine Kuo , University of Michigan.
Polymer Building, Room A312. (NIST Contact: Carl Simon, 301-975-8574, carl.simon@nist.gov)

3:00 PM - MATHEMATICAL AND COMPUTATIONAL SCIENCES DIVISION SEMINAR: The Craik-Criminale Class of Solutions to the Incompressible Navier-Stokes and Similar Equations
Bruce Fabijonas , Southern Methodist University, Dallas, TX.
NIST North (820) Bldg, Rm. 145. (NIST Contact: Daniel Lozier, 301-975-2706, daniel.lozier@nist.gov) http://math.nist.gov/mcsd/Seminars/2002/2002-06-25-fabijonas.html


6/26 -- WEDNESDAY

No Scheduled Events

6/27 -- THURSDAY

10:00 AM - INFORMATION TECHNOLOGY LABORATORY SEMINAR: StarLight: A facility for Experimental Networks & e-Science Applications
Some Chicago universities and labs are creating an exciting network facility called StarLight, anchoring over $40M of government and university investments in advanced optical networking infrastructure, anticipating near future applications requiring distributed petascale computing, exabyte storage, and terabit networks . Built by and for computer science and e-science researchers, using technology at the highest experimental levels, it lays a foundation for future fully optical switching. This presentation covers the strategies proposed and provides a preview of iGrid2002 in Amsterdam where 28 e-Science and Grid projects will be run over 2.5-10Gb links from various places in the US and Europe. Professor Thomas DeFanti Director, Electronic Visualization Lab University of Illinois, Chicago
Thomas DeFanti , Director, Electronic Visualization Lab.
NIST North Bldg, Rm. 152. (NIST Contact: Larry Reeker, 301-975-5147, larry.reeker@nist.gov)

10:30 AM - POLYMERS DIVISION SEMINAR: Symyx Technologies: An Overview of the Collaborations. Discovery Tools and IP Licensing Programs
M. Uhrich , Director of Technology Commercialization, Symyx Technologies, Inc., Santa Clara, CA.
Polymers Bldg, Rm. B245. (NIST Contact: E. Amis, 301-975-6681, eric.amis@nist.gov)

1:30 PM - POLYMERS DIVISION SEMINAR: Miscibility Mediated Interdiffusion at Polymer Interfaces
An analysis of the relationship between interdiffusion, phase behavior, and fracture energy in the partially miscible polymer system of polystyrene (PS) and the statistically random copolymer poly(styrene-co-4-bromostyrene) (PBS), (C8H(8-x)Brx)N, where x is the mole fraction of brominated repeat units in the copolymer and N the degree of polymerization, was carried out. Relevant parameters such as the mutual diffusion coefficient, interfacial width, and the Flory-Huggins interaction parameter were measured by experimental techniques; Rutherford backscattering spectroscopy, X-ray reflectivity, and small angle X-ray scattering, respectively, were used. Atomic force microscopy was used to investigate the phase separation and thin film characteristics. Theories for the mobility, through the expression of the mutual diffusion coefficient, and miscibility, through the square-gradient modification to the expression for polymer-polymer interdiffusion, were applied to elucidate the effect of both kinetics and thermodynamics on interdiffusion in partially miscible polymer systems. Excellent agreement was found between the interdiffusion, interfacial width, and phase behavior studies, all of which follow the behavior expected based on phase diagrams predicted using the measured Flory-Huggins interaction parameter. Measurements of the interfacial fracture energy concur, and a direct relationship between the macroscopic and microscopic properties is demonstrated.
Erin Jablonski , Iowa State University, Ames, IA.
224 Bldg, Rm. A312. (NIST Contact: Eric Lin, 301-975-6743, eric.lin@nist.gov)


6/28 -- FRIDAY

3:00 PM - SURF SUMMER SEMINAR SERIES: The Metallurgy of Shipwrecks: Titanic, Arizona and Hunley
With proper care, an iron ship can last for hundreds of years on the surface of the water. Sink it, and all bets are off. Corrosion, biocorrosion, biofouling, wave action, collisions and nettings all take a toll on a ship's structure and cause it to decay and collapse. Many historical wrecks around the world are rapidly falling apart, and several are being actively investigated to determine if their structures, and their historical legacies, can be preserved. In this talk, past projects and work in progress on ships like the Titanic, Lusitania, USS Arizona, USS Monitor, CSS Hunley and the Andrea Doria will be discussed. You will discover that corrosion is the main enemy of a wreck -- after all, rust is what most metals want to be!
Tim Foecke , Materials Science and Engineering Laboratory, Metallurgy Division, Gaithersburg, MD, tfoecke@nist.gov.
Administration Bldg, Green Auditorium. (NIST Contact: Tim Foecke, 301-975-6592, tfoecke@nist.gov)
Special Assistance Available: Contact A. Sweigert in advance


ADVANCE NOTICE

No Scheduled Events

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MEETINGS ELSEWHERE


6/24 -- MONDAY

No Scheduled Events

6/25 -- TUESDAY

No Scheduled Events

6/26 -- WEDNESDAY

No Scheduled Events

6/27 -- THURSDAY

No Scheduled Events

6/28 -- FRIDAY

No Scheduled Events

ADVANCE NOTICE

No Scheduled Events

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TALKS BY NIST PERSONNEL

MASLAR, J. : IN SITU CHARACTERIZATION OF GAS-PHASE NUCLEATED SILICON PARTICLES FORMED VIA SILANCE PYROLYSIS IN A THERMAL CHEMICAL VAPOR DEPOSITION REACTOR.
Nanoparticles and Nanostructures Through Vapor Phase Synthesis Conference, Pascoli, Italy, 6/19.

MCMICHAEL, R. : N-MAGNON MODEL FOR EXTRINSIC FMR LINEWIDTH AND ENHANCED DAMPING IN FILMS WITH PT OVERLAYERS.
National Storage Industry Consortium Annual Meeting, Monterey, CA, 6/19.

COLLE, R. : A REVIEW OF THE NEEDS FOR ACTIVITY CHARACTERIZATION AND MEASUREMENT QUALITY ASSURANCE FOR MINIATURE SEALED SOURCES.
International Atomic Energy Agency, Co-ordinated Research Program, Polish Natinal Atomic Agency, Warsaw, POLAND, 6/24.

BURNS, T. : IMPACT-OSCILLATOR MODEL FOR LOW RADIAL IMMERSION MILLING.
14th U.S. National Congress of Theoretical and Applied Mechanics, Blacksburg, VA, 6/25.

BAUER, B. : SANS CHARACTERIZATION OF NANO-POROUS THIN FILMS FOR THE NEXT GENERATION OF INTEGRATED CIRCUITS.
American Conference on Neutron Scattering, Knoxville, TN, 6/25.

COLLE, R. : ACTIVITY STANDARDIZATIONS OF BRACHYTHERAPY SOURCES BY LIQUID-SCINTILLATION-SPECTROMETRY-BASED DESTRUCTIVE RADIOANALYTICAL ASSAYS AND BY ISOTHERMAL MICROCALORIMETRY.
Radioisotope Centre POLATOM, Otwock-Swierk, Poland, 6/25.

COLLE, R. : ACTIVITY CHARACTERIZATION OF BRACHYTHERAPY SOURCES.
International Atomic Energy Agency, Co-ordinated Research Program Meeting, Polish National Atomic Agency, Warsaw, POLAND, 6/25.

WALLACE, W. : RECENT ADVANCES IN SATURATED HYDROCARBON MASS SPECTROMETRY.
BAM, Berlin, Germany, 6/25.

SHULL, R. : SURFING THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY.
Centers Conference on Integrative Research, Columbia University, New York, NY, 6/25.

MIGDALL, A. : A SINGLE PHOTON ON-DEMAND SOURCE WITH DECOUPLED SINGLE AND MULTIPHOTON PROBABILITIES.
6th International Conference on Quantum Communication, Measurement and Computing, Cambridge, MA, 6/26.

KEARSLEY, A. : HIERARCHICAL CONTROL OF SYSTEMS GOVERNED BY DIFFERENTIAL EQUATIONS.
Computer Science Research Institute (CSRI) Annual Meeting, Livermore, CA, 6/26.

CURRY, J. (Co-Authors: C.Sansonetti , NIST G.Nave ) : PROGRESS REPORT ON NIST'S CONTRIBUTION TO THE ALITE LIGHTING RESEARCH CONSORTIUM.
ALITE Organizational Meeting/Electric Power Research Institute, University of Illinois, Urbana-Champaign, IL, 6/26.

CHAKA, A. : PREDICTION OF SURFACE & INTERFACE PROPERTIES FROM FIRST PRINCIPLES.
Alcoa Technical Center, Monroeville, PA, 6/27.

BENNETT, H. : TWO-DIMENSIONAL, CLOSED-FORM ANALYTIC EXPRESSIONS FOR MOBILITIES AND EFFECTIVE INTRINSIC CARRIER CONCENTRATIONS IN GA1-XALXAS BASED ON QUANTUM MECHANICAL CALCULATIONS.
Silvaco International, Silvaco International Eastern Technology Center 7 Technology Drive North Chelmsford, MA 01863 (, 6/27.

STILES, M. : NON-COLLINEAR SPIN TRANSFER IN CO/CU/CO MULTILAYERS.
University of Kaiserslautern, Kaiserslautern, Germany, 6/27.

BUNTIN, S. : OXYGEN ATOM INTERACTIONS WITH FUSED SILICA: 1D AND 3P STATE-RESOLVED ENERGY TRANSFER DYNAMICS.
NANO7/ECOSS1 Conference, Malmo, Sweden, 6/27.

SEHGAL, A. : "COMBINATORAL LIBRARIES OF BIORECEPTION OF POLYMERS".
Gordon Research Conference, Meriden, New Hampshire, 6/30.

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ANNOUNCEMENTS

EARLY DEADLINE FOR TECHNICALENDAR SUBMISSIONS
Due to the upcoming holiday, the deadline for the July 8 to July 12, 2002, NIST Technicalendar will be 12:00 NOON, MONDAY, July 1, 2002. THANK YOU
NIST Contact: Sharon Mingo, 301-975-3570, mingo@nist.gov

2002 U.S. WORLD STANDARDS DAY PAPER COMPETITION
This year the U.S. standards community will celebrate World Standards Day on 16 October. To highlight the importance of standards to industry and government, the sponsors of World Standards Day, including NIST, are again holding a paper competition. The theme for the 2002 World Standards Day paper contest will be "Standards Mean Business." PRIZES: The first place winner will be awarded a plaque and $2,500. Second and third place winners will receive $1,000 and $500 respectively. In addition, the winning papers will be published in the Standards Engineering Society (SES) Standards Engineering with the first place winner also appearing as a special article in the ANSI Reporter. ELIGIBILITY: The competition is open to individuals in private sector or government facilities. The paper may be co-authored. RULES: The paper must be original and not previously published. NIST papers should be processed through WERB or BERB in the usual way. Entries must be received by 30 August 2002. Contest rules and applications forms may be obtained through SES website: http://www.ses-standards.org or by emailing the SES Executive Director: hgziggy@worldnet.att.net
NIST Contact: Ellen Trager, 301-975-4038, ellen.trager@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 Mingo, Editor, Stop 2500, National Institute of Standards and Technology, Gaithersburg MD 20899-2500; Telephone: 301-975-TCAL (8225); Fax: 301-926-4431; or Email: tcal@nist.gov.

All lectures and meetings are open unless otherwise stated.

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