vault backup: 2026-02-04 21:51:55

.obsidian/plugins/digitalgarden/manifest.json

@@ -1,7 +1,7 @@
 {
 	"id": "digitalgarden",
 	"name": "Digital Garden",
-	"version": "2.68.0",
+	"version": "2.69.0",
 	"minAppVersion": "1.10.0",
 	"description": "Publish your notes to the web for others to enjoy. For free.",
 	"author": "Ole Eskild Steensen",

.obsidian/plugins/obsidian-excalidraw-plugin/manifest.json

@@ -1,7 +1,7 @@
 {
   "id": "obsidian-excalidraw-plugin",
   "name": "Excalidraw",
-  "version": "2.20.0",
+  "version": "2.20.2",
   "minAppVersion": "1.5.7",
   "description": "Sketch Your Mind. An Obsidian plugin to edit and view Excalidraw drawings. Enter the world of 4D Visual PKM.",
   "author": "Zsolt Viczian",

2026-02-04.md

@@ -90,7 +90,7 @@ Has such behavior been observed,
 or has chief strategy been organization-aligned
 in spite of the incentive?
 
-## 2025-02-04
+## 2026-02-04
 
 ### T-Shirt Sizing
 
@@ -126,7 +126,7 @@ The buckets chosen should be wide enough
 that scale can be confidently estimated
 after minimal investigation.
 
-## 2025-02-04 13:42
+## 2026-02-04 13:42
 
 [[fire-alarm-takeoff]]
 
@@ -140,7 +140,7 @@ after minimal investigation.
 > but further investigation may be expected
 > if more than a few per floor are shown.
 
-## 2025-02-04 17:02
+## 2026-02-04 17:02
 
 While observing takeoff for
 [[electrical-takeoff#Unit Condensing Units|unit condensing units]],
@@ -161,3 +161,39 @@ the upper end of reasonable ECI.
 (see [[value-of-information.jpg]])
 
 My response was not well formulated.
+
+## 2026-02-04 18:05
+
+Expected value of sample information (EVSI)
+must define acceptable takeoff.
+If not, we are---by definition---
+throwing money away
+in the form of wasted estimator hours
+and missed bid opportunities.
+
+## 2026-02-04 19:35
+
+### Time Interval Conversion
+
+In [[2026-01-09#2026-01-09 12:00]]
+I defined time intervals according to averages
+which are true of the Gregorian calendar for $\lim\limits_{t\to\infty}$,
+but which are not so appropriate for a human lifetime scale.
+
+True of the Gregorian calendar (and its predecessors)
+for all time scales:
+
+$$
+\begin{align*}
+1~\text{Year} &\equiv 12~\text{Months} \\
+1~\text{Week} &\equiv 7~\text{Days}
+\end{align*}
+$$
+
+In 2001--2099 leap years occur exactly once in four years.
+
+$$
+\begin{align*}
+1~\text{Year} &= 365.25~\text{Days} \\
+\end{align*}
+$$