Article on O(N) real-space method for ab initio quantum transport calculations and application to carbon nanotube-metal contacts.

Correspondence issued by the General Accounting Office with an abstract that begins "As part of its audit of the U.S. government's fiscal year 2000 financial statements, GAO reviewed computer controls over key financial systems maintained and operated by the Federal Reserve Banks (FRB) on behalf of the Department of the Treasury's Financial Management Service (FMS) and the Bureau of the Public Debt (BPD). GAO identified opportunities to improve general controls related to access at two data centers; access, system software, and service continuity at a third data center; and access and system software at a fourth data center. GAO also identified opportunities to improve authorization controls over four key applications and accuracy controls over one of these key applications. FRB had corrected or mitigated the risks associated with all vulnerabilities discussed in earlier GAO reports. Although the general and application controls identified do not pose significant risks to the FMS and BPD financial systems, they warrant action to decrease the risk of inappropriate disclosure and modification of sensitive data and programs, misuse of or damage to computer resources, and disruption of critical operations."

Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses the long-term viability of the Social Security program. Social Security's Trust Funds will not be exhausted until 2038, but the trustees now project that the program's cash demands on the rest of the federal government will begin much sooner. Aiming for sustainable solvency would increase the chance that future policymakers would not have to face these difficult questions on a recurring basis. GAO has developed the following criteria for evaluating Social Security reform proposals: financing sustainable solvency, balancing adequacy and equity, and implementing and administering reforms. These criteria seek to balance financial and economic considerations with benefit adequacy and equity issues and the administrative challenges associated with various proposals. GAO's recent report on Social Security and income adequacy (GAO-02-62) makes three key points. First, no single measure of adequacy provides a complete picture; each measure reflects a different outlook on what adequacy means. Second, given the projected long-term financial shortfall of the program, it is important to compare proposals to both benefits at currently promised levels and benefits funded at current tax levels. Third, various approaches to benefit reductions would have differing effects on adequacy."

We demonstrate the first field trial of optical label-based wavelength switching and packet drop on 476.8km of the National Transparent Optical Network. Subcarrier multiplexed labels control a switch fabric that includes a tunable wavelength converter and arrayed waveguide grating router.

Reconciliation report with an ending account balance of $1,043.54 reconciled for the period ending on November 30, 2001.

Deposit summary of $24.00 made on December 10, 2001.

This home movie excerpt documents Lauren Lindsey's activities at home as recorded by her mother.

The Lawrence Berkeley National Laboratory has been engaged in the design, construction and testing of four superconducting dipoles (Superbends) that are installed in three arcs of the Advanced Light Source (ALS), with the fourth magnet as a spare. This represents a major upgrade to the ALS providing an enhanced flux and brightness at photon energies above 10 keV. In preparation for installation, an extensive set of tests and measurements have been conducted to characterize the magnetic and cryogenic performance of the Superbends and to fiducialize them for accurate placement in the ALS storage ring. The magnets are currently installed, and the storage ring is undergoing final commissioning. This paper will present the results of magnetic and cryogenic testing.

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A chicane magnet incorporating counter-rotating permanent magnet pairs together with trim coils has been designed for use in the Advanced Light Source (ALS) straights in conjunction with two insertion devices. In particular, this design is being developed for use in the existing beam line (BL) 4 elliptically polarizing undulator (EPU) straight and in the BL11 EPU straight, currently under design and construction. The purpose of the chicane is to provide a fixed angular separation between two successive EPU photon fans, and to correct steering perturbations resulting from EPU polarization state changes. Polarization changes occur on the time scale of one second; associated steering corrections must be accomplished in less than a second. Hysteresis associated with conventional iron core electromagnets prevents fast steering correction to the required precision. This consideration motivated the iron-free design presented here.

The Systems Engineering (SE) staff at LBNL has generated the following artifacts to assist projects with implementing a systems approach: (1) The present document that focuses on the what, why, and when of SE. It also provides a simple case-study to illustrate several SE tasks. (2) A web site with primary emphasis on the project life-cycle and workflow, (http://www-eng.LBNL.gov/Systems/index.html). It includes: SE guidelines and principles; A list of in-house tools; Templates; Case studies with ''how to'' examples; and Links to useful SE material. These sources are living documents to be updated as necessary. The viewpoint adopted in this document is that what LBNL engineers and scientists need is a set of principles and guiding practices for developing R and D systems rather than a ''cookbook''. There are many excellent ''how to'' resources such as the ''INCOSE Systems Engineering Handbook'' to guide those in search of more details. The SE staff is another resource available to consult and support projects. This document specifies SE principles and activities that are applicable to all LBNL projects independent of their specific differences. Each project should tailor the SE implementation to meet its individual needs and culture including project-specific resources, procedures, products, and tools.

Semiconductor nanocrystals with narrow and tunable fluorescence are covalently linked to oligonucleotides. These biocompounds retain the properties of both nanocrystals and DNA. Therefore, different sequences of DNA can be coded with nanocrystals and still preserve their ability to hybridize to their complements. We report the case where four different sequences of DNA are linked to four nanocrystal samples having different colors of emission in the range of 530-640 nm. When the DNA-nanocrystal conjugates are mixed together, it is possible to sort each type of nanoparticle using hybridization on a defined micrometer -size surface containing the complementary oligonucleotide. Detection of sorting requires only a single excitation source and an epifluorescence microscope. The possibility of directing fluorescent nanocrystals towards specific biological targets and detecting them, combined with their superior photo-stability compared to organic dyes, opens the way to improved biolabeling experiments, such as gene mapping on a nanometer scale or multicolor microarray analysis.

Funeral program for Sister Susie May Dimry. The funeral was held December 10, 2001 at Lewis Funeral Home Chapel, officiated by Dr. J. S. Smith. Funeral arrangements were made through Lewis Funeral Home and she was buried in Fort Sam Houston National Cemetery near San Antonio, Texas.

Optical code division multiple access (O-CDMA) uses very narrow transmission pulses and is thus susceptible to fiber optic link impairments. When the O-CDMA is implemented as wavelength/time (W/T) matrices which use wavelength division multiplexing (WDM) sources such as multi-frequency laser transmitters, the susceptibility may be higher due to: (a) the large bandwidth utilized and (b) the requirement that the various wavelength components of the codes be synchronized at the point of modulation and encoding as well as after (optical) correlation. A computer simulation based on the nonlinear Schroedinger equation, developed to study optical networking on the National Transparent Optical Network (NTON), was modified to characterize the impairments on the propagation and decoding of W/T matrix codes over a link of the NTON. Three critical link impairments were identified by the simulation: group velocity dispersion (GVD); the flatness of the optical amplifier gain; and the slope of the GVD. Subsequently, experiments were carried out on the NTON link to verify and refine the simulations as well as to suggest improvements in the W/T matrix signal processing design. The NTON link measurements quantified the O-CDMA dispersion compensation requirements. Dispersion compensation management is essential to assure the performance of W/T matrix codes.

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This Plan describes the technology development program for alpha/strontium removal and Caustic Side Solvent Extraction cesium removal in FY2002. Crystalline Silicotitanate and Small Tank Tetratphenylborate Precipitation are discussed as possible backup technologies. Previous results are summarized in the Savannah River Site Salt Processing Project Research and Development Summary Report.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Photograph of a scene during the Festival of Lights.

Photograph of a scene during the Festival of Lights.

Photograph of a scene during the Festival of Lights.

Photograph of a scene during the Festival of Lights.

Photograph of a scene during the Festival of Lights.

Photograph of a scene during the Festival of Lights.

Photograph of a scene during the Festival of Lights.