From 6905213d27001df957b6411e59ddc949c029c3df Mon Sep 17 00:00:00 2001 From: Lars-Dominik Braun Date: Sun, 8 Mar 2020 15:21:32 +0100 Subject: report: Expand analysis Expand explanation of proposed layout and criticism of other layouts. --- lulua/data/report/index.html | 266 ++++++++++++++++++++++++++++--------------- lulua/data/report/style.css | 23 +++- 2 files changed, 198 insertions(+), 91 deletions(-) (limited to 'lulua') diff --git a/lulua/data/report/index.html b/lulua/data/report/index.html index 5c4ef8f..d240ba7 100644 --- a/lulua/data/report/index.html +++ b/lulua/data/report/index.html @@ -118,18 +118,18 @@
-

The Arabic Alphabet

+

The Arabic alphabet

- There are 28 letters in the Arabic alphabet, plus quite a few extra - symbols required for proper text input, like the hamza in its different + 28 letters make up the Arabic alphabet and quite a few extra + symbols are required for proper text input, like the hamza in its different shapes أ إ آ ء ئ ؤ, ta marbutah ة, alif maqsurah ى and various diacritics for vowelized texts. - Since the usability of a keyboard layout depends on the text entered - it is necessary to study letter and letter combination frequencies first. + Since the performance of a keyboard layout depends on the text entered + it is necessary to study its mono-, di- and trigraph frequencies first. - The corpus used for the following analysis consists of + The novel corpus built for the following analysis consists of

@@ -193,7 +193,7 @@

Layout properties

-

The following evaluation uses color coding to identify fingers:

+

Throughout this evaluation color coding is used to identify fingers:

red
little finger
@@ -207,6 +207,44 @@
thumb

Asymmetry is defined as the difference between left and right hand usage.

+ +

+ The layout proposed uses four layers and assumes a 102/105 key ISO + keyboard common in Europe to accomodate the shift keys necessary. + + These are in order: Shift on the left and + right, caps lock on the left and the + rightmost key in the middle row, the + key right of the left shift key and the key labeled Alt Gr to + the right of the spacebar. + + Symbols are assigned to the four layers by their function: characters, punctuation, diacritics, other. +

+

+ The first layer was optimized using an extended reimplementation of carpalx. + + From several runs with 100.000 iterations each the layout which had + good scores and looked reasonable to the human eye was picked. + + Optimal arrengement of layers two and up are still under investigation. +

+ +

+ The most frequent letters have all been assigned to the home row, which + makes them easily accessible. + + ا and ل + are typed with different hands, balancing the load on hands almost + evenly. + + The index and middle finger of both hands share the majority of the + typing load, but naturally the left middle finger is used more + frequently due to its assignment to the letter alif. +

@@ -243,103 +281,129 @@ -
+
SourceWordsCharacters