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3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

more free publications
 
year (astronomical), Bessel year
Symbol:  aastr. 
Category:  Time 
SI Equivalent:  3.15579×107 s
Dimension
Convert     aastr.  
1 aastr. =
Permeability coefficient
  Symbol Unit Name
3.15579×107  kg-m/N-s  kilogram meter per newton per second 
2.17158×1019  perm-inch (0 °C)  perm-inch (0°C) 
2.16255×1019  perm-inch (23 °C)  perm-inch (23°C) 
2.17158×1022  perm-mil (0 °C)  perm-mil (0°C) 
2.16255×1022  perm-mil (23 °C)  perm-mil (23°C) 
Time
  Symbol Unit Name
1.30465×1024  a.u.  a.u. of time 
3.65253×107    blink 
365.253  d  day 
366.254  d (sider.)  day (sidereal) 
26.0895    fortnight 
8766.08  h  hour 
3.35736×1030    Jordan's elementary time 
3.15579×1013  ms  microsecond 
3.15579×1010  ms  millisecond 
5.25965×105  min, mn  minute 
12.1751    month (30 days) 
13.3686    month (sidereal) 
12.0083    month (solar mean) 
12.3686    month (synodic), lunar month 
3.15579×1016  ns  nanosecond 
3.15579×107  s  second 
3.15579×1015    shake 
52.179  w  week 
9.46736×1016    wink 
1.00069  a, y  year (calendar) 
0.999991    year (sidereal) 
1.00001  a, y  year (solar mean) 
1.00003  atrop.  year (tropical) 
Glossary
3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.