フクロウは鳥類では珍しく夜行性の動物である。闇夜にまぎれて音もなく木から舞い降り、鋭いつめで野ネズミやウサギにおそいかかる。鳥の中でフクロウが最も静かに飛べるとも言われている。フクロウが音を立てずに飛ベるのは、翼の羽に秘密がある。翼の前のふちに生えている「風切り羽」に普通の鳥にはない小さなギザギザがたくさんついていて、このギザギザが空気の抵抗を減らす役割を持っているので、空中で音がしないのである。
ギザギザのついたパンタグラフを採用することで、新幹線が騒音をおさえて時速300kmで走行できるようになった。
自動車や電車が出す騒音には、エンジンや車輪の音ももちろんあるが、乗り物と空気がぶつかって起きる音も無視できない。高速で走れば走るほど、空気抵抗による騒音は大きくなる。フクロウの静かに飛ぶ技術に学べば、乗り物の騒音を減らすことができる。
| Query | Error | Affected | Num. rows | Took (ms) | Actions |
|---|---|---|---|---|---|
| SHOW FULL COLUMNS FROM `contents` | 16 | 16 | 1 | maybe slow | |
| SELECT CHARACTER_SET_NAME FROM INFORMATION_SCHEMA.COLLATIONS WHERE COLLATION_NAME= 'utf8_general_ci'; | 1 | 1 | 1 | ||
| SHOW FULL COLUMNS FROM `users` | 10 | 10 | 0 | ||
| SHOW FULL COLUMNS FROM `groups` | 4 | 4 | 0 | ||
| SHOW FULL COLUMNS FROM `permissions` | 5 | 5 | 1 | maybe slow | |
| SHOW FULL COLUMNS FROM `groups_permissions` | 3 | 3 | 0 | ||
| SHOW FULL COLUMNS FROM `groups_users` | 3 | 3 | 1 | maybe slow | |
| SHOW FULL COLUMNS FROM `contents_searches` | 6 | 6 | 0 | ||
| SHOW FULL COLUMNS FROM `attachments` | 11 | 11 | 1 | maybe slow | |
| SHOW FULL COLUMNS FROM `attachments_revs` | 13 | 13 | 1 | maybe slow | |
| SHOW FULL COLUMNS FROM `contents_related_items` | 5 | 5 | 0 | ||
| SHOW FULL COLUMNS FROM `related_items` | 6 | 6 | 1 | maybe slow | |
| SHOW FULL COLUMNS FROM `contents_related_items_revs` | 8 | 8 | 1 | maybe slow | |
| SHOW FULL COLUMNS FROM `contents_tags` | 5 | 5 | 0 | ||
| SHOW FULL COLUMNS FROM `tags` | 7 | 7 | 0 | ||
| SHOW FULL COLUMNS FROM `tag_groups` | 6 | 6 | 0 | ||
| SHOW FULL COLUMNS FROM `contents_tags_revs` | 7 | 7 | 0 | ||
| SHOW FULL COLUMNS FROM `contents_revs` | 18 | 18 | 1 | maybe slow | |
| SELECT `Content`.`id`, `Content`.`user_id`, `Content`.`last_edit_user_id`, `Content`.`post_date`, `Content`.`post_date_year`, `Content`.`post_date_month`, `Content`.`post_date_day`, `Content`.`title`, `Content`.`title_en`, `Content`.`content`, `Content`.`plain_content`, `Content`.`page_view`, `Content`.`flag`, `Content`.`mod_count`, `Content`.`created`, `Content`.`modified` FROM `contents` AS `Content` WHERE `id` = 196 LIMIT 1 | 1 | 1 | 0 | ||
| SELECT `Attachment`.`file_name`, `Attachment`.`dir`, `Attachment`.`model`, `Attachment`.`foreign_key` FROM `attachments` AS `Attachment` WHERE `file_name` <> 'default.jpg' AND `Attachment`.`foreign_key` = (196) | 1 | 1 | 0 | ||
| SELECT `ContentsRelatedItem`.`content`, `ContentsRelatedItem`.`related_item_id`, `ContentsRelatedItem`.`content_id` FROM `contents_related_items` AS `ContentsRelatedItem` WHERE `ContentsRelatedItem`.`content_id` = (196) | 10 | 10 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 1 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 2 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 4 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 6 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 7 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 8 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 9 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 9 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 9 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`code`, `RelatedItem`.`name` FROM `related_items` AS `RelatedItem` WHERE `RelatedItem`.`id` = 11 | 1 | 1 | 0 | ||
| SELECT `ContentsTag`.`id`, `ContentsTag`.`tag_group_id`, `ContentsTag`.`mod_count`, `ContentsTag`.`tag_id`, `ContentsTag`.`content_id` FROM `contents_tags` AS `ContentsTag` WHERE `ContentsTag`.`content_id` = (196) | 2 | 2 | 0 | ||
| SELECT `Tag`.`name`, `Tag`.`comment`, `Tag`.`tag_group_id` FROM `tags` AS `Tag` WHERE `Tag`.`id` = 12 | 1 | 1 | 0 | ||
| SELECT `TagGroup`.`code`, `TagGroup`.`name` FROM `tag_groups` AS `TagGroup` WHERE `TagGroup`.`id` = 1 | 1 | 1 | 0 | ||
| SELECT `Tag`.`name`, `Tag`.`comment`, `Tag`.`tag_group_id` FROM `tags` AS `Tag` WHERE `Tag`.`id` = 175 | 1 | 1 | 0 | ||
| SELECT `TagGroup`.`code`, `TagGroup`.`name` FROM `tag_groups` AS `TagGroup` WHERE `TagGroup`.`id` = 7 | 1 | 1 | 0 | ||
| SELECT `RelatedItem`.`id`, `RelatedItem`.`code`, `RelatedItem`.`name`, `RelatedItem`.`created`, `RelatedItem`.`modified`, `RelatedItem`.`flag` FROM `related_items` AS `RelatedItem` WHERE `code` = 'function' LIMIT 1 | 1 | 1 | 0 | ||
| SELECT `Content`.`id`, `Content`.`title`, `Content`.`title_en` FROM `contents` AS `Content` WHERE id = (NULL) ORDER BY `id` desc | 0 | 0 | 1 | maybe slow |
Peak Memory Use 8.78 MB
| Message | Memory use |
|---|---|
| Component intitailization | 6.79 MB |
| Controller action start | 6.83 MB |
| Controller render start | 6.90 MB |
| View render complete | 7.92 MB |
Total Request Time: 302 (ms)
| Message | Time in ms | Graph |
|---|---|---|
| Core Processing (Derived) | 113.88 | |
| Component initialization and startup | 6.81 | |
| Controller action | 13.46 | |
| Render Controller Action | 22.76 | |
| » Rendering View | 20.76 | |
| » » Rendering APP/views/contents/view.ctp | 10.11 | |
| » » Rendering APP/views/layouts/default.ctp | 8.98 | |
| » » » Rendering APP/views/elements/header.ctp | 0.61 | |
| » » » Rendering APP/views/elements/content_sidebar.ctp | 0.21 | |
| » » » Rendering APP/views/elements/footer.ctp | 0.18 |
