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126022 results found

Ballistic test results for several different soft body armor systems

Data provided by  National Institute of Standards and Technology

The performance standard for ballistic-resistant body armor published by the National Institute of Justice (NIJ), NIJ Standard 0101.06, recommends estimating the perforation performance of body armor by performing a statistical analysis on V50 ballistic limit testing data. The first objective of this study is to evaluate and compare the estimations of the performance provided by different statistical methods applied to ballistic data generated in the laboratory.

Tags: ballistic limit,logistic regression,c-log-log,probit

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SHREC'11 Track: Shape Retrieval on Non-rigid 3D Watertight Meshes

Data provided by  National Institute of Standards and Technology

Non-rigid 3D objects are commonly seen in our surroundings. However, previous efforts have been mainly devoted to the retrieval of rigid 3D models, and thus comparing non-rigid 3D shapes is still a challenging problem in content-based 3D object retrieval. Therefore, we organize this track to promote the development of non-rigid 3D shape retrieval.
The objective of this track is to evaluate the performance of 3D shape retrieval approaches on a large-scale database of non-rigid 3D watertight meshes generated by our group.

Tags: 3D Non-rigid Shape Retrieval,3D Non-rigid Models,3D shape analysis,Evaluation

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NIST Electron Effective-Attenuation-Length Database - SRD 82

Data provided by  National Institute of Standards and Technology

The NIST Electron Effective Attenuation Length Database provides values of electron effective attenuation lengths (EALs) in materials at user-selected electron energies between 50 eV and 2,000 eV. The database was designed mainly to provide EALs (to account for effects of elastic-electron scattering) for measurements of the thicknesses of overlayer films and, to a much lesser extent, for measurements of the depths of thin marker layers. EALs are calculated using an algorithm based on electron transport theory for measurement conditions specified by the user.

Tags: Auger electron spectroscopy,ESCA,XPS,depth distribution function,effective attenuation length,electron spectroscopy for chemical analysis,material database,photoelectron,photoelectron spectroscopy,photoemission,surface analysis,X-ray photoelectron spectroscopy

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Source: https://www-s.nist.gov/srd_online/index.cfm?fuseaction=home.main&productID=SRD82v1.3

Guide to Available Mathematical Software

Data provided by  National Institute of Standards and Technology

The Guide to Available Mathematical Software (GAMS) is a virtual repository of software for solving frequently occurring mathematical problems such as the linear systems of equations, differential equations and evaluation of special functions. Access to the database is provided through a web interface in which software can be identified through a problem classification scheme or by name.

Tags: applied mathematics; scientific computing; software components; Fortran; C

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Source: http://gams.nist.gov/

NIST Electron Inelastic-Mean-Free-Path Database - SRD 71

Data provided by  National Institute of Standards and Technology

The NIST Electron Inelastic-Mean-Free-Path Database provides values of electron inelastic mean free paths (IMFPs) principally for use in surface analysis by Auger-electron spectroscopy and X-ray photoelectron spectroscopy. The database includes IMFPs calculated from experimental optical data and IMFPs measured by elastic-peak electron spectroscopy. If no calculated or measured IMFPs are available for a material of interest, values can be estimated from the predictive IMFP formulae of Tanuma et al. and of Gries.

Tags: Auger electron,Auger electron spectroscopy,ESCA,X ray photoelectron spectroscopy,XPS,electron spectroscopy for chemical analysis,inelastic mean free path,material database,photoelectron,photoelectron spectroscopy,photoemission,surface analysis

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Source: https://www-s.nist.gov/srd_online/index.cfm?fuseaction=home.main&productID=SRD71V1.2

NIST XCOM: Photon Cross Sections Database - SRD 8

Data provided by  National Institute of Standards and Technology

A web database is provided which can be used to calculate photon cross sections for scattering, photoelectric absorption and pair production, as well as total attenuation coefficients, for any element, compound or mixture (Z <= 100) at energies from 1 keV to 100 GeV. XCOM provides two forms of output: (a) tables which correspond closely in format to existing tables in the literature; (b) graphical display of the tabular data.

Tags: X rays,Xrays,bremsstrahlung,electron pair productions,elements,energies,gamma rays,mixtures,nuclear pair productions,nuclear physics,photons,physics,total attenuation coefficients

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Source: https://dx.doi.org/10.18434/T48G6X

FY 2009 EDA Annual Report

Data provided by  Economic Development Administration

The Economic Development Administration's annual report to Congress documenting EDA's efforts to fulfil its mission of leading the federal economic development agenda in the fiscal year 2009

Tags: annual report,2009,economic development

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NIST Potential Energy Surface Database of Group II Dimer Molecules

Data provided by  National Institute of Standards and Technology

This database provides critical atomic and molecular data needed in order to evaluate the feasibility of using laser cooled and trapped Group II atomic species (Mg, Ca, Sr, and Ba) for ultra-precise optical clocks or quantum information processing devices.

Tags: Semi Empirical potential energy curves,ab initio,dimers,potential energy curves,surface databases,surfaces

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Source: https://dx.doi.org/10.18434/T4Q590

NIST Atomic Weights and Isotopic Compositions with Relative Atomic Masses

Data provided by  National Institute of Standards and Technology

The atomic weights are available for elements 1 through 118 and isotopic compositions or abundances are given when appropriate. Version 3.0.

Tags: Commission on Atomic Weights and Isotopic Abundances,International Union for Pure and Applied Chemistry,SIAM,atomic mass evaluation,Atomic Weights,Elemental Data,elements,mass spectrometry,measurements,physics,relative atomic masses,representative isotopic compositions,statistical evaluation of isotopic abundances,subcommittee for isotopic abundance

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Source: https://dx.doi.org/10.18434/T4KG6Q

A Benchmark for Automatic Best View Selection of 3D Objects

Data provided by  National Institute of Standards and Technology

BEST VIEW SELECTION corresponds to the task of automatically selecting the most representative view of a 3D model.

This benchmark aims to provide tools to evaluate automatic best view selection algorithms. It consists of the preferred viewpoints of 68 models selected by 26 human subjects, and a code to calculate "View selection error". The subjective viewpoints were collected using a web-based subjective experiment where the users were asked to select the most informative view of a 3D model.

Tags: Best view selection,3D shape analysis,Best view evaluation

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