User contributions for Johanwiden
A user with 27 edits. Account created on 7 June 2014.
10 May 2024
- 08:4108:41, 10 May 2024 diff hist +424 Talk:Spacetime →Extending momentum to four dimensions: Wrong unit for vertical axis, unclear explanation: Reply current Tag: Reply
- 08:3508:35, 10 May 2024 diff hist +170 Spacetime →Extending momentum to four dimensions: Clarify what coordinate axes in figure 3.8 are. Note that in Bais the figure on p 87 does not include a spacetime coordinate system. current
9 May 2024
- 14:4214:42, 9 May 2024 diff hist +196 Talk:Spacetime →Longitudinal Doppler effect: Unclear, "W = YW' " should be "w = gamma * w' ": Reply Tag: Reply
- 13:2213:22, 9 May 2024 diff hist +153 Talk:Minkowski space →Add a forward reference to definition of "scalar product" at first use of symbol for scalar product: Reply current Tag: Reply
- 13:2113:21, 9 May 2024 diff hist +15 m Minkowski space →Causal structure: Change visible link name to "scalar product", to make it less distracting.
- 13:1713:17, 9 May 2024 diff hist +34 m Minkowski space →Causal structure: Added link to later section "Scalar product", to explain what symbol eta means.
- 13:0313:03, 9 May 2024 diff hist +299 Talk:Minkowski space →Misleading text for image "Subdivision of Minkowski spacetime": Reply Tag: Reply
- 12:5412:54, 9 May 2024 diff hist +167 Minkowski space →Causal structure: Terminology: Replaced absolute future/past with causal future/past, while also keeping the old terminology. Why: make it easier to understand. Found no good terminology for this in books : Bais "Very special relativity", Taylor, Wheeler "Spacetime Physics"
17 March 2024
- 12:0912:09, 17 March 2024 diff hist +555 Talk:Spacetime →Extending momentum to four dimensions: Wrong unit for vertical axis, unclear explanation: new section Tag: New topic
- 08:5608:56, 17 March 2024 diff hist +82 Talk:Spacetime →Longitudinal Doppler effect: Unclear, "W = YW' " should be "w = gamma * w' "
- 08:4308:43, 17 March 2024 diff hist +583 Talk:Spacetime →Longitudinal Doppler effect: Unclear, "W = YW' " should be "w = gamma * w' ": new section Tag: New topic
14 March 2024
- 10:1710:17, 14 March 2024 diff hist +409 Talk:Minkowski space →Add a forward reference to definition of "scalar product" at first use of symbol for scalar product: new section Tag: New topic
13 March 2024
- 14:5914:59, 13 March 2024 diff hist +416 Talk:Minkowski space →Misleading text for image "Subdivision of Minkowski spacetime": new section Tag: New topic
7 June 2014
- 18:1918:19, 7 June 2014 diff hist +354 International Article Number →How the GTIN (formerly EAN-13) is encoded: Scanning the barcode in two passes.
- 15:5715:57, 7 June 2014 diff hist +559 International Article Number →Example
- 15:2015:20, 7 June 2014 diff hist +108 International Article Number →How the GTIN (formerly EAN-13) is encoded
- 15:0915:09, 7 June 2014 diff hist +53 International Article Number Added an example barcode image. Tag: Visual edit
- 14:4214:42, 7 June 2014 diff hist 0 m International Article Number →Coding: Capitalized
- 14:4114:41, 7 June 2014 diff hist +1 International Article Number →Coding: Corrected classification of similar encodings.
- 12:3112:31, 7 June 2014 diff hist +441 International Article Number →Coding: Scanning direction- Tag: Visual edit
- 12:2212:22, 7 June 2014 diff hist +150 International Article Number →Coding
- 12:1712:17, 7 June 2014 diff hist +3,118 International Article Number Undid revision 611939342 by ClueBot NG (talk) Tag: reverting anti-vandal bot
- 12:0412:04, 7 June 2014 diff hist 0 International Article Number →Coding
- 12:0012:00, 7 June 2014 diff hist +1,238 International Article Number →Coding: Added table of encodings.
- 11:2111:21, 7 June 2014 diff hist +3 m International Article Number →Coding: Grammatic correction. Tag: Visual edit
- 11:1511:15, 7 June 2014 diff hist +1,647 International Article Number How the GTIN is encoded. This is a translation from the German Wikipedia page. Tag: Visual edit
- 10:0810:08, 7 June 2014 diff hist +230 International Article Number Where in the barcode does each digit in EAN-13 appear
