vault backup: 2026-04-27 17:01:41

README.md

@@ -12,8 +12,8 @@ tags:
 ---
 # zmVault
 
-This note concerns the meta-formatting of this repository.
+> This note concerns the meta-formatting of this repository.
-For contents, prose conventions, etc. see [[this-notebook]].
+> For contents, prose conventions, etc. see [[this-notebook]].
 
 ## Syntax
 

convex-hull.md

@@ -1,9 +1,8 @@
 ---
+title: Convex Hull
 tags:
   - authorship/other-for-now
-  - topic/math
   - type/encyclopedia-entry
-title: Convex Hull
 ---
 # Convex Hull
 

decrease-in-sigma.md

@@ -2,11 +2,18 @@
 title: Decrease in Sigma
 tags:
   - destiny/uncertain
-  - topic/math/statistics
   - type/encyclopedia-entry
 ---
 # Decrease in Sigma
 
+%%
+relevant to [[statistics]]:
+
+graphs intended to visually demonstrate
+a decrease in [[uncertainty]]
+for a random variable represented by a probability distribution.
+%%
+
 ## Normal PDF
 
 ```tikz

functional-estimating.md

@@ -2,7 +2,6 @@
 tags:
   - destiny/uncertain
   - topic/estimating
-  - topic/math
   - type/idea
   - authorship/llm
 title: Functional Estimating
@@ -13,7 +12,7 @@ title: Functional Estimating
 This note is LLM output
 intended to illustrate the problem
 of [[uncertainty]] in [[construction-estimating]]
-using mathematical concepts and notation.
+using [[math]] concepts and notation.
 %%
 
 Suppose a function

game-theory.md

@@ -1,12 +1,17 @@
 ---
 title: Game Theory
 tags:
-  - topic/math
   - topic/strategy
   - type/encyclopedia
 ---
 # Game Theory
 
+%%
+[[math]] subdiscipline?
+
+determine optimal or most likely [[strategy]]
+%%
+
 ## Domains
 
 * [[auction-theory]]

geometry.md

@@ -0,0 +1,7 @@
+---
+title: Geometry
+tags: []
+---
+# Geometry
+
+[[math]]

hilltop-gardens.md

@@ -6,6 +6,8 @@ up: "[[conest-projects]]"
 ---
 # Hilltop Gardens
 
+[[pdi-building-types#Garden Style]]
+
 6 buildings + clubhouse
 3 building types
 

monte-carlo-methods.md

@@ -1,13 +1,16 @@
 ---
 tags:
   - status/draft
-  - topic/math
   - topic/risk
   - type/encyclopedia-entry
 title: Monte Carlo Methods
 ---
 # Monte Carlo Methods
 
+%%
+relevant to [[statistics]]
+%%
+
 > [!quote] [Monte Carlo methods](https://en.wikipedia.org/wiki/Monte_Carlo_method)
 > Monte Carlo methods or Monte Carlo experiments,
 > are a broad class of computational algorithms

periodic/daily/2026-04-27.md

@@ -0,0 +1,10 @@
+---
+id: 2026-04-27
+title: 2026-04-27
+tags: []
+weekly: "[[2026w18]]"
+monthly: "[[2026-04]]"
+quarterly: "[[2026q2]]"
+previous: "[[2026-04-26]]"
+---
+# 2026-04-27

realization.md

@@ -1,7 +1,6 @@
 ---
 title: Realization
-tags:
+tags: []
-  - topic/math/statistics
 ---
 # Realization
 

sigmoid-functions.md

@@ -1,14 +1,13 @@
 ---
-tags:
-  - topic/math
-  - type/encyclopedia-entry
 title: Sigmoid Functions
+tags:
+  - type/encyclopedia-entry
 ---
 # Sigmoid Functions
 
 ![[sigmoid-function-example.excalidraw]]
 
-$f'(x)$ is a **sigmoid** function.
+$f'(x)$ is a **sigmoid** [[function]].
 
 A sigmoid function compresses a function with infinite range to (0,1)
 

statistical-modeling-for-construction-estimating.md

@@ -3,7 +3,6 @@ title: Statistical Modeling for Construction Estimating
 tags:
   - topic/construction
   - topic/estimating
-  - topic/math/statistics
   - type/cross-topic
 ---
 # Statistical Modeling for Construction Estimating

statistical-modeling.md

@@ -1,11 +1,13 @@
 ---
 title: Statistical Modeling
 tags:
-  - topic/math/statistics
   - type/encyclopedia-entry
 ---
 # Statistical Modeling
 
+**Statistical modeling**
+uses [[statistics]] to forecast uncertain events
+
 Bayesian inference is a method of **statistical inference**,
 the practice of analyzing and describing
 

statistical-significance.md

@@ -1,12 +1,13 @@
 ---
+title: Statistical Significance
 tags:
   - authorship/other-for-now
-  - topic/math/statistics
+  - type/encyclopedia-entry
-  - type/encyclopedia
-title: Statistical Significance
 ---
 # Statistical Significance
 
+In [[statistics]]
+
 > [!quote] [Statistical significance - Wikipedia](https://en.wikipedia.org/wiki/Statistical_significance)
 > In statistical hypothesis testing,
 > a result has statistical significance
@@ -21,7 +22,7 @@ title: Statistical Significance
 > is the probability of obtaining a result at least as extreme,
 > given that the null hypothesis is true.
 > The result is said to be statistically significant,
-> by the standards of the study, when $p \leq \alpha$
+> by the standards of the study, when $p \leq \alpha$...
 >
 > The significance level for a study
 > is chosen before data collection,

timestamped/2025-07-18_00-00-00.md

@@ -1,15 +1,19 @@
 ---
 id: 2025-07-18T00:00:00-0400
 title: 2025-07-18 ??:??:??
-tags:
+tags: []
-  - topic/construction
-  - topic/estimating
 daily: "[[2025-07-18]]"
 ---
 # 2025-07-18 ??:??:??
 
 ## Estimating Isn't Engineering
 
+%%
+Anecdote criticizing the common preference for [[information]]
+in [[construction-estimating]],
+or maybe the common frustration when it isn't provided.
+%%
+
 A peer recently expressed frustration to me
 about the declining quality of construction drawings,
 specifically how systems are often missing details

timestamped/2025-11-06_18-12-00.md

@@ -12,6 +12,18 @@ daily: "[[2025-11-06]]"
 
 ## "Bad Bid Practice"
 
+%%
+Anecdote criticizing the common adversarial model
+of subcontractor-GC relations
+(or more generally contractor-customer)
+in [[construction-contracting]].
+My position is that
+deliberately hiding information from the customer
+(lacking [[transparency]] in interactions)
+always costs the contractor
+more than they stand to gain from it.
+%%
+
 I might be reprimanded for the things I've said about deceptive bid practices
 were I to repeat them to the wrong person,
 but I can't, in good conscience, take them back.

timestamped/2026-01-30_16-29-00.md

@@ -1,12 +1,16 @@
 ---
 id: 2026-01-30T16:29:00-0500
 title: 2026-01-30 16:29:??
-tags:
+tags: []
-  - topic/math/statistics
 daily: "[[2026-01-30]]"
 ---
 # 2026-01-30 16:29:??
 
+## New Statistics Concepts
+
+[[statistics]] topics researched while reading
+[[hubbard_2025_project-management]]:
+
 ### Laplace's Rule of Succession (LRS)
 
 > [!info]
@@ -20,7 +24,11 @@ $$
 \frac{1+m}{2+n}
 $$
 
-### Rule of Five
+### "Rule of Five"
+
+> Hubbard et al. speak of this "rule"
+> as if it's well known by that name,
+> but I can't corroborate that.
 
 The probability that any given sample is above the median is 50%.
 The probability that the minimum and maximum values of $n$ samples

timestamped/2026-04-23_10-01-40.md

@@ -15,6 +15,7 @@ daily: "[[2026-04-23]]"
 
 Note extensive emergency power provisions
 verify control wiring for generator to ATS
+
 #### Lighting HR's
 
 count of circuits, control zones in takeoff notes
@@ -36,6 +37,7 @@ extended light layouts
 ASL Column 2 with adjustments
 
 Site Labor +50%
+
 #### Telecom Backbone
 
 #### Medium Voltage
@@ -45,6 +47,7 @@ Medium voltage cabling downstream of
 #### Underground Runs
 
 need rigid 90's for PVC runs 200ft and above
+
 > horizontal? vertical? both?
 
 #### Fixture Labor
@@ -59,7 +62,8 @@ assuming each crystal is an individual fixture
 over 5000 crystals
 80 circuits
 
-A-GAM-442
+Arch set A-GAM-442
+
 ##### Dragon Fixture
 
 1000 hours
@@ -75,6 +79,7 @@ or "Standalone" with Network Bridges.
 #### DAS
 
 Sold Design Build
+
 #### Historicals
 
 Want to know
@@ -97,4 +102,3 @@ Extra cost for facade lighting install
 250,000
 
 "Go to 150k"
-

timestamped/2026-04-27_10-05-24.md

@@ -0,0 +1,23 @@
+---
+id: 2026-04-27T10:05:24-0400
+title: 2026-04-27 10:05:24
+tags: []
+daily: "[[2026-04-27]]"
+---
+# 2026-04-27 10:05:24
+
+## Minimum Wire Size for Small Garage Buildings
+
+Relevant to [[electrical-takeoff]] and [[fixtures-takeoff]]:
+
+[[hilltop-gardens]] has 3 separate garage buildings,
+each with 12 isolated bays.
+The buildings are about 70ft long,
+with all runs less than 100ft.
+
+I asked [[joel-jansen]] if it would be necessary
+to use minimum 10 AWG
+as is [[conest]] standard
+for [[pdi-breakdowns#Bid Item Garage|Garage]].
+He said it would not be,
+and confirmed 12 AWG is acceptable in this case.

timestamped/2026-04-27_12-19-33.md

@@ -0,0 +1,23 @@
+---
+id: 2026-04-27T12:19:33-0400
+title: 2026-04-27 12:19:33
+tags: []
+daily: "[[2026-04-27]]"
+---
+# 2026-04-27 12:19:33
+
+It is common in [[construction-contracting]]
+when offering [[value-engineering]] options
+or deductive [[change-orders]] to the customer
+to offer deducts less than your estimated value
+for the scope to be deducted.
+
+I'm sure in the wider industry
+the practice not maliciously motivated,
+only intended to cover the cost of estimating,
+but this is rarely communicated to junior estimators
+and never to the customer.
+In my own experience with it
+while with my previous employer,
+it was only ever justified as
+"because we can, because they don't know".

timestamped/2026-04-27_12-43-54.md

@@ -0,0 +1,25 @@
+---
+id: 2026-04-27T12:43:54-0400
+title: 2026-04-27 12:43:54
+tags: []
+daily: "[[2026-04-27]]"
+---
+# 2026-04-27 12:43:54
+
+## Voltage Drop for ConEst
+
+Continuing a recent conversation
+I've been having with [[joel-jansen]]
+on [[voltage-drop]],
+both ideally and for application in [[conest]],
+Joel brought Bill Swan with Estimating Solutions
+over to my desk.
+Bill said that when he is calculating voltage drop
+he doesn't the ubiquitous "Voltage Drop Calc 2011.xlsx"
+which uses a simple DC calculation,
+he uses [[pdi-vdc]]'s calculator,
+which is based on AC resistance and reactance.
+
+I showed them my own calculator,
+which also has AC capability
+The difference

timestamped/2026-04-27_12-56-35.md

@@ -0,0 +1,83 @@
+---
+id: 2026-04-27T12:56:35-0400
+title: 2026-04-27 12:56:35
+tags: []
+daily: "[[2026-04-27]]"
+---
+# 2026-04-27 12:56:35
+
+## Virginia Live! Internal Review
+
+[[virginia-live-casino-and-hotel]]
+
+Underfloor power is Reloc.
+Customer is curious if it would be more cost effective to use MC.
+
+Objective is to discuss closeout mainly:
+quotes and subs.
+
+FF&E
+Concern that all fixtures are captured
+
+"add a line for aiming and testing"
+1 week (80 hours)
+
+Shift rate
+"in the past we've paid a little more for night work,
+but nothing crazy"
+
+$2,500 per day scaffold
+
+### Site Services
+
+Ditch witches for most excavation
+
+idea floated to buy equipment rather than rent
+bobcat
+wire puller
+hydraulic bender
+
+Do we own dewatering?
+pretty sure yes
+
+### MV Terminations
+
+No one at PDI can perform MV terms
+so they must be subbed out
+
+worst case $300k
+
+9 terms $60k
+
+to be quoted by Ops
+
+### Testing
+
+primary injection testing
+
+NETA testing
+
+to be quoted by Ops
+
+### Rigging
+
+Ops quoted $85k to take one generator off the truck.
+
+to be quoted by Ops
+
+### Burden
+
+PTO not included in burden
+because it is not charged to the job
+
+### Admin Housing
+
+Ops paying $4,500 for 6-bed
+
+### Composite Cleanup
+
+terms in contract
+
+### Permits
+
+to be quoted by Ops