Words

English
influx
[N-COUNT: usu sing, oft N of n] An influx of people or things into a place is their arrival there in large numbers.
militia
[N-COUNT] A militia is an organization that operates like an army but whose members are not professional soldiers.
emphasis
1 [N-VAR: oft N on n] Emphasis is special or extra importance that is given to an activity or to a part or aspect of something.
boast
1 [VERB: V that, V about/of n/-ing, V about/of n/-ing, V, also V with quote] disapproval If someone boasts about something that they have done or that they own, they talk about it very proudly, in a way that other people may find irritating or offensive.
hostile
1 [ADJ: oft ADJ to/towards n] If you are hostile to another person or an idea, you disagree with them or disapprove of them, often showing this in your behaviour.
Occupancy
[N-UNCOUNT: usu with supp] Occupancy is the act of using a room, building, or area of land, usually for a fixed period of time. (FORMAL)
deemed
[VERB: be V-ed adj/n, V n adj/n, be V-ed to-inf] If something is deemed to have a particular quality or to do a particular thing, it is considered to have that quality or do that thing. (FORMAL)
naval
[ADJ: ADJ n] Naval means belonging to, relating to, or involving a country's navy.
sworn
2 [ADJ: ADJ n] If you make a sworn statement or declaration, you swear that everything that you have said in it is true.
confined
1 [ADJ: v-link ADJ to n] If something is confined to a particular place, it exists only in that place. If it is confined to a particular group, only members of that group have it.
settle
1 [VERB: V n, V n] If people settle an argument or problem, or if something settles it, they solve it, for example by making a decision about who is right or about what to do.

MapReduceのデータモデル

分散

http://d.hatena.ne.jp/naoya/20080513/1210684438

MapReduceでMapからReduceに入るデータは、key-valuesペア。key-valueペアで
ないことに注意。

こんな感じ。

# key  => values (Iterator)
200    => [ 1,1,1,1,1,1,1,1,1,... ]
304    => [ 1,1,1,1,1,1,1,1,1,... ]
404    => [ 1,1,1,1,1,1,1,1,1,... ]
500    => [ 1,1,1,1,1,1,1,1,1,... ]

keyはsortされている。

しかし、Mapで出てきたデータをどうやってsortするのだろう。Mapは分散したノー
ドで計算されているわけでその結果も分散して入ってくる。Reduceの手前でsort
するのであれば、結局Reduceでsortするのと手間(消費メモリとか)は変わらない。

分散したデータをうまくsortする仕組みがあるのかなぁ。

メカナムホイール

メカナムホイール(Mecanum Wheel)とは、車軸に対して45度傾けられたローラーを車輪の周りに等間隔に並べた車輪

メカナムホイールによって、回転軸を動かさずに全方向に移動することが可能。横に移動するときは、前輪と後輪を逆向きに動かせばよい。

http://en.wikipedia.org/wiki/Mecanum_wheel