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Calculations.

If all molecules in this bottle could be used, this hydrogen bottle contains enough protons to feed the Large Hadron Collider for 200’000 years of continuous operation! But since there are losses inside the source, in and between the accelerators, such a bottle only lasted for 4 to 6 months of operations and needed then to be replaced.

Lorentz groups.Notes

The 9816 was introduced in late 1982. This was the low-cost model in the 200 Series range. It only had two expansion slots and featured a monitor integrated with the system unit and modular keyboard and mass storage (usually a 9121 dual 3.5 inch floppy drive). The monitor was nine inches diagonally with a 400 by 300 dot resolution. The HP 9816 was also designated as the HP 9000 216. It did not include any disk drives but it had a built-in 9 inch monochrome monitor, built-in HP-IB and RS-232 ports and 2 expansion slots. The standard keyboard for the 9816 is a itty-bitty number. The 9816 A came with 128K bytes of memory. The 9816 S included all of the above plus disk based BASIC and a card containing an additional 256K of memory bringing the total memory to 512K but only leaving only one expansion slot open.

The 2671 was a text-only printer with a maximum print speed of 120 characters per second. The 2671 printers are very robust. For paper, they use normal thermal roll paper sold in most office supply stores for older fax machines. Although thermal printing is a quiet technology, the paper advance mechanism of these printers is plenty loud.

Notes and calculations on homogeneous and non-homogeneous Lorentz gorups.Notes

Calculations related to an article by F. Belinfante in Physica, 6, 887, 1939: "On the spin angular momentum of mesons".Calculations

Notes and calculations on high temperatures. Related to an article by W. Opechowski in Physica.Notes

Hitachi Travelstar C4K60 with a storage capacity of 60GB, 4200RPM.