メモ。IEEEの用語辞典が欲しい。
信頼性（reliability）
可用性との区別がいまいちわからん。
- マグローヒル科学技術用語大辞典第3版：信頼度（reliability）
(工学) 系，機器または部品の規定の条件で，意図する期間に規定の機能を適正に遂行する確率．
- マグローヒル科学技術用語大辞典第3版：信頼度 confidence１）, reliability２），３）
（統計）
- ある定まった失敗率を超えないという保証の程度.
- 結果におかれる信用の度合.
- 同じ対象を繰り返して測定したときの分散によって測られた観測値の精度．
The IEEE defines it as ". . . the ability of a system or component to perform its required functions under stated conditions for a specified period of time."
In engineering, reliability is the ability of a system or component to perform its required functions under stated conditions for a specified period of time. It is often reported in terms of a probability. Evaluations of reliability involve the use of many statistical tools.
可用性（availability）
計算機の中でデータ，データチャネル，入出力装置などが，他のタスクに直接使用されておらず，いつでも使える状態にあること．
可用性、つまりシステムの壊れにくさのこと。
可用性（かようせい、英: Availability; アベイラビリティ）とはシステムが継続して稼動できる能力のこと。
- The degree to which a system, subsystem, or equipment is operable and in a committable state at the start of a mission, when the mission is called for at an unknown, i.e., a random, time. Simply put, availability is the proportion of time a system is in a functioning condition.
- The ratio of (a) the total time a functional unit is capable of being used during a given interval to (b) the length of the interval.
汎用性（general-purpose）
- ロングマン現代用語英英辞典第4版 general-*purpose
suitable for most situations or jobs, or having a wide range of uses
ディペンダビリティ（dependablity）
登録しているメーリングリストによくこの分野の会議のCFPが流れてくる。
The original definition of dependability for a computing system gathers the following attributes or non-functional requirements:
- Availability: readiness for correct service
- Reliability: continuity of correct service
- Maintainability: to undergo modifications and repairs
and combines them with the concepts of Threats and Failures to create Dependability.
ディペンダブル(Dependable)とは、一般的な信頼性にとどまらず、たとえ一部が壊れても残りの部分でうまく働くといった自立的自己修復的な動作をさす概念である。大規模集積回路、コンピュータシステムなどで使われる言葉である。
pervasive computing （ubiquitous computing）
「〜性」じゃないけど、よく会議のCFPが流れてくるので。日本語で言うと遍在性？
Ubiquitous computing (ubicomp) is a post-desktop model of human-computer interaction[citation needed] in which information processing has been thoroughly integrated into everyday objects and activities. In the course of ordinary activities, someone "using" ubiquitous computing engages many computational devices and systems simultaneously, and may not necessarily even be aware that they are doing so. This model is in an advancement from the desktop paradigm.
This paradigm is also described as pervasive computing, ambient intelligence, or more recently, everyware. When primarily concerning the objects involved, it is also physical computing, the Internet of Things, haptic computing, and things that think.
Pervasive computing is the trend towards increasingly ubiquitous (another name for the movement is ubiquitous computing), connected computing devices in the environment, a trend being brought about by a convergence of advanced electronic - and particularly, wireless - technologies and the Internet. Pervasive computing devices are not personal computers as we tend to think of them, but very tiny - even invisible - devices, either mobile or embedded in almost any type of object imaginable, including cars, tools, appliances, clothing and various consumer goods - all communicating through increasingly interconnected networks.
