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Gaithersburg

Methane Symmetry Operations - Permutation-Inversion

3. Permutation-Inversion Group Ideas Longuet-Higgins [ 1] has pointed out that an alternative and more powerful way of treating molecular...

Methane Symmetry Operations - Table 4

Table 4. Transformation matrices D E( P) for ( eq. 6) The transposes of these matrices form a representation of the point group T d of...

Methane Symmetry Operations - Table 3

Table 3. Transformation matrices D F 1( P) for ( eq. 5) The transposes of these matrices form a representation of the point group T d of...

Methane Symmetry Operations - Representation Matrices

2.3 Representation Matrices The transposes of the matrices D(P) given in Table 2 form a representation [ 22] of the point group T d...

Methane Symmetry Operations - Table 2

Table 2. Transformation matrices D( P) for ( eq. 1) The transposes of these matrices form a representation of the point group T d of species...

Methane Symmetry Operations - Algebraic operations

2.2 Algebraic operations The geometrical operations can be transformed into algebraic operations by asking: what are the new coordinates...

Methane Symmetry Operations - Geometric operations

2. Familiar Point Group Ideas 2.1 Geometric operations Figure 1 illustrates the four hydrogens of CH 4 numbered [ 17] and placed at the...

Methane Symmetry Operations - Introduction

1. Introduction The goal of this article, a more detailed title for which is "a catalogue of explicit symmetry operations for the...

Methane Symmetry Operations - Version History

Example of how to reference this online document: (Replace year, month day with database access date.) J.T. Hougen (2001). "Methane...

NIST Grants Take Regional Approach to Solve National Cybersecurity Challenge

September 20, 2016

GAITHERSBURG, Md.—The U.S. Commerce Department’s National Institute of Standards and Technology (NIST) has awarded grants totaling nearly $1 million for five...

Comparisons (Archive): Analysis of a new candidate Certified Reference Material (CRM) prepared by the International Atomic Energy Agency (IAEA)

An international measurement intercomparison exercise for radioactivity determination in Baltic Sea sediment started for a new IAEA CRM development.

5472: Dimensional Metrology Hands-on Workshop-Cancelled

Tue, Nov 15 - Thu, Nov 17 2016

The basic principles of dimensional metrology are the same for nearly every calibration made in typical labs. This 3 day

2D Materials Nanosculpting and Bioelectronics Applications

Tue, Nov 22 2016

Electron beams constitute powerful tools to shape materials with atomic resolution inside a transmission electron

Supported by Granite, New SURF Beamline Is Real Heavyweight

September 21, 2016

If your work involves sensing, measuring or using ultraviolet light, the National Institute of Standards and Technology (NIST) has great news for you: Granite...

Comparisons (Archive): International Inter-Comparison Exercise (IICE) for Natural CRMs development

Certified Reference Materials (CRMs) are needed to develop and validate method analysis, and also for quality monitoring of established radioanalytical

Environmental: NIST Radiochemistry Intercomparison Program (NRIP)

The performance of individual labs for specific measurements is determined by the use of a proficiency test. Results reported by labs are compared to a

Comparisons: Radiological Traceability Program (RTP)

The Radiological Traceability Testing Program (RTP) is a testing program that helps the Radiological and Environmental Sciences Laboratory (RESL), the

5448: Metrología de masas - Cancelado

Mon, Jun 19 - Fri, Jun 30 2017

This course is being taught in Spanish. Equivalent courses are available in English. El Seminario de metrología de

NIST Releases Expanded "Fractography" Guide for Analyzing, Understanding Brittle Material Failures

September 16, 2016

Studying the fractures of industrially important materials such as ceramics and glasses provides important clues on why these materials can fail and how to make...

Micro and Nanoscale Fabrication and Characterization for Next-Generation Biosensors

Mon, Sep 26 2016

In this talk, our work on the fabrication and characterization of two next-generation biosensors is presented. The first

The Divergent Beam Diffractometer (DBD) Laboratory

The Divergent Beam Diffractometer is the primary instrument at NIST used to certify powder SRMs for their X-ray diffraction properties. It...

NIST Patents Single-Photon Detector for Potential Encryption and Sensing Apps

September 15, 2016

Individual photons of light now can be detected far more efficiently using a device patented by a team including the National Institute of Standards and...

5447: Fundamentos de Metrología - Cancelado

Mon, Feb 27 - Fri, Mar 3 2017

This course is being taught in Spanish. Equivalent courses are available in English. El seminario Fundamentos de

NIST Releases Baldrige-Based Tool for Cybersecurity Excellence

September 15, 2016

WASHINGTON, D.C.— The U.S. Commerce Department’s National Institute of Standards and Technology (NIST) released today the draft Baldrige Cybersecurity...

Directed Assembly of Nanostructured Soft Materials by Magnetic Field Interactions

Mon, May 9 2016

Molecular self-assembly of block copolymers and small molecule surfactants gives rise to a rich phase behavior as a

Advanced Measurements on the Nanoscale Enabled by Technique Development in the Scanning Transmission Electron Microscope

Fri, Jul 15 2016

With recent advances in in-situ microscopy, a new era in microscopy has arrived that allows for the dynamic imaging of

Revealing Dynamic Transformations of Materials using in situ Scanning Transmission Electron Microscopy

Fri, Jul 22 2016

Recent advances in the development and implementation of microfabricated platforms for in situ/operando liquid S/TEM

Imaging Dirac-Mass Disorder from Magnetic Dopant-Atoms in the Ferromagnetic Topological Insulator Crx(Bi0.1Sb0.9)2-xTe3

Wed, Aug 3 2016

Topological insulators (TI) have a gapless surface state of Dirac fermions protected by the time reversal symmetry (TRS)

Realistic Electromagnetic Modeling of CNT and Graphene Composites: Quantifying the Effect of Shape and Distribution

Mon, Oct 17 2016, 10:30 - 11:30am EDT

Prof. Ahmed Hassan University of Missouri - Kansas City Carbon nanotubes (CNT) and Graphene Flakes (GF) exhibit

Superconductors, brains, and light: the future of advanced computing

Tue, Sep 13 2016

For over 50 years, progress in computing has been made largely through lithographic advances which enabled ever-smaller

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