Overview of HTTP, HTML, WWW and web technologies.
The combo HTTP and HTML is the foundation of the World Wide Web (WWW).
HTML (HyperText Markup Language) defines a text-based format for describing the contents of a web page. HTML is based on tags similar to XML (eXtensible Markup Language), but its definition is less strict.
HTML pages are transported with the HTTP protocol (HyperText Transmission Protocol) over TCP/IP based networks.
The power of the WWW comes with the links based on URLs (Uniform Resource Locators) that connect pages to form a web of content.
Browsers display links as clickable items that, when clicked, trigger the browser to load the web page pointed to by the link.
This statelessness contributed a lot to the stability and scalability of the world wide web where web servers are only tasked with the delivery of web pages while the browser is responsible for the rendering of web pages.
The static nature of the early World Wide Web was soon augmented with the dynamic creation of web pages by web servers or by enriching static web pages with dynamic content.
Technologies like CGI (Common Gateway Interface), JSP (Java Server Pages) or ASP (Active Server Pages) were developed to provide the infrastructure to build dynamic web applications.
These server-side technologies were complemented with client-side technologies like Javascript and AJAX (Asynchronous Javascript And XML).
Web page caching is an important mechanism to reduce latency in loading web pages and reducing network traffic.
HTTP defines different caching control mechanisms. Simpler caching methods are based on web page expiry dates while more complex mechanisms use web page validation.
about this presentation:
1) this presentation was a quickie for non-tech employees, who wanted a basic understanding of html/css, as it related to a white-label SAAS product;
2) the back-end/front-end definitions relate to the specific application (it's inaccurate if node.js is in the picture)
Overview of HTTP, HTML, WWW and web technologies.
The combo HTTP and HTML is the foundation of the World Wide Web (WWW).
HTML (HyperText Markup Language) defines a text-based format for describing the contents of a web page. HTML is based on tags similar to XML (eXtensible Markup Language), but its definition is less strict.
HTML pages are transported with the HTTP protocol (HyperText Transmission Protocol) over TCP/IP based networks.
The power of the WWW comes with the links based on URLs (Uniform Resource Locators) that connect pages to form a web of content.
Browsers display links as clickable items that, when clicked, trigger the browser to load the web page pointed to by the link.
This statelessness contributed a lot to the stability and scalability of the world wide web where web servers are only tasked with the delivery of web pages while the browser is responsible for the rendering of web pages.
The static nature of the early World Wide Web was soon augmented with the dynamic creation of web pages by web servers or by enriching static web pages with dynamic content.
Technologies like CGI (Common Gateway Interface), JSP (Java Server Pages) or ASP (Active Server Pages) were developed to provide the infrastructure to build dynamic web applications.
These server-side technologies were complemented with client-side technologies like Javascript and AJAX (Asynchronous Javascript And XML).
Web page caching is an important mechanism to reduce latency in loading web pages and reducing network traffic.
HTTP defines different caching control mechanisms. Simpler caching methods are based on web page expiry dates while more complex mechanisms use web page validation.
about this presentation:
1) this presentation was a quickie for non-tech employees, who wanted a basic understanding of html/css, as it related to a white-label SAAS product;
2) the back-end/front-end definitions relate to the specific application (it's inaccurate if node.js is in the picture)
【DLゼミ】XFeat: Accelerated Features for Lightweight Image Matchingharmonylab
公開URL:https://arxiv.org/pdf/2404.19174
出典:Guilherme Potje, Felipe Cadar, Andre Araujo, Renato Martins, Erickson R. ascimento: XFeat: Accelerated Features for Lightweight Image Matching, Proceedings of the 2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) (2023)
概要:リソース効率に優れた特徴点マッチングのための軽量なアーキテクチャ「XFeat(Accelerated Features)」を提案します。手法は、局所的な特徴点の検出、抽出、マッチングのための畳み込みニューラルネットワークの基本的な設計を再検討します。特に、リソースが限られたデバイス向けに迅速かつ堅牢なアルゴリズムが必要とされるため、解像度を可能な限り高く保ちながら、ネットワークのチャネル数を制限します。さらに、スパース下でのマッチングを選択できる設計となっており、ナビゲーションやARなどのアプリケーションに適しています。XFeatは、高速かつ同等以上の精度を実現し、一般的なラップトップのCPU上でリアルタイムで動作します。
セル生産方式におけるロボットの活用には様々な問題があるが,その一つとして 3 体以上の物体の組み立てが挙げられる.一般に,複数物体を同時に組み立てる際は,対象の部品をそれぞれロボットアームまたは治具でそれぞれ独立に保持することで組み立てを遂行すると考えられる.ただし,この方法ではロボットアームや治具を部品数と同じ数だけ必要とし,部品数が多いほどコスト面や設置スペースの関係で無駄が多くなる.この課題に対して音𣷓らは組み立て対象物に働く接触力等の解析により,治具等で固定されていない対象物が組み立て作業中に運動しにくい状態となる条件を求めた.すなわち,環境中の非把持対象物のロバスト性を考慮して,組み立て作業条件を検討している.本研究ではこの方策に基づいて,複数物体の組み立て作業を単腕マニピュレータで実行することを目的とする.このとき,対象物のロバスト性を考慮することで,仮組状態の複数物体を同時に扱う手法を提案する.作業対象としてパイプジョイントの組み立てを挙げ,簡易な道具を用いることで単腕マニピュレータで複数物体を同時に把持できることを示す.さらに,作業成功率の向上のために RGB-D カメラを用いた物体の位置検出に基づくロボット制御及び動作計画を実装する.
This paper discusses assembly operations using a single manipulator and a parallel gripper to simultaneously
grasp multiple objects and hold the group of temporarily assembled objects. Multiple robots and jigs generally operate
assembly tasks by constraining the target objects mechanically or geometrically to prevent them from moving. It is
necessary to analyze the physical interaction between the objects for such constraints to achieve the tasks with a single
gripper. In this paper, we focus on assembling pipe joints as an example and discuss constraining the motion of the
objects. Our demonstration shows that a simple tool can facilitate holding multiple objects with a single gripper.
14. Multi
Media Mouse,
HTML5 Key ev.
Forms
W3C
Offline
HTML5 HTML5 Support
Parser
WAI-
XHTML5 ARIA
Semantic
Elements
15. Canvas
Web
WHATWG Messag-
ing
Multi Web
Media Mouse, Sockets
HTML5 Key ev.
Forms
W3C Server-
Offline
HTML5 HTML5 Support
Sent ev.
Parser
Web
WAI-
XHTML5 Storage
ARIA
Semantic
Elements Web
Workers
Micro-
HTML Data
16. Canvas
Web
WHATWG Messag-
ing
Multi Web
Media Mouse, Sockets
HTML5 Key ev.
Forms
W3C Server-
Offline
HTML5 HTML5 Support
Sent ev.
Parser
Web
WAI-
XHTML5 Storage
ARIA
Semantic
Elements Web Media
Workers Layout Queries
Micro-
HTML Data
Trans
CSS3~ Flex
Box
form
Anim
Regions
ation
17. Khronos SMIL Vibra-
tion
WebGL Geo-
SVG
other location
Orien-
tation
Canvas
WHATWG Web IETF
Messag-
ing Web
Multi SPDY
Web Sockets DNT
Media Mouse, Sockets
HTML5 Key ev. XHR2
FileAPI CSP
Forms
W3C Server-
Offline ECMA
HTML5 HTML5 Support
Sent ev. ECMA
Script
Parser
Indexed
Web
WAI- DB
XHTML5 Storage
ARIA
Semantic
Elements Web Media
Workers Layout Queries
Micro-
HTML Data
Trans
CSS3~ Flex
Box
OGP XPath form
RSS Anim
Math Regions
ation
ML WOFF
DOM4
18. Khronos SMIL Vibra- MP3
WebCL Webm Opus
tion
WebGL Geo-
SVG
H.264
other location
Orien-
Web
Audio Notifi-
tation Web
Canvas cation
WHATWG Web IETF RTC
Messag-
ing Web TCP Tel
Multi SPDY
Web Sockets DNT Socket
Media Mouse, Sockets
HTML5 Key ev. XHR2 Radio
FileAPI CSP
Forms Net
W3C Server- Info
Offline ECMA
HTML5 HTML5 Support
Sent ev. ECMA
Script ECMA
NFC
Parser 6th
Indexed
Web Device
WAI- DB
Storage Storage
XHTML5 ARIA
Semantic Web
Elements Web SQL
Media
USB
Workers Layout Queries
File
Micro- Sys
HTML Data
Trans
CSS3~ Flex Battery
Status
Box
OGP XPath form Proxi-
Anim mity
Schema RSS Math Regions
.org ation
ML WOFF
RDF DOM4
19. HTML5 なんてもう古い
HTML5 = 安定ブランチ
2014 W3C 勧告に向けて標準化中
HTML = 最新の HTML
日々進化を続ける最新 HTML
最新 Web != HTML5
遙かに多くの技術が進化してる
50. Web API
Web の限界を押し進める
従来の基本的な API 以外
Mozilla が勝手に呼んでる API の
総称であって明確な定義はない
https://wiki.mozilla.org/WebAPI
51. 以前からある Web API
Geolocation (位置情報)
Orientation (加速度)
Audio Data API
WebGL (3D グラフィック)
Camera API (Media Capture)
これらはもちろん Android 版 Firefox でも実装済み
52. 実装済みの Web API
SMS, Telephony, Alarm
Mobile Connection, WiFi Info,
Network Info (通信速度等),
Contacts, Settings, Time/Clock
Idle, Battery Status
Resource Lock (スリープ禁止)
まだ不完全な実装の API も一部含む
53. 実装済みの Web API
Vibration, Pointer Lock
Ambient Light (環境光),
Proximity (近接),
Mouse Lock (移動量取得)
Device Storage, Browser
Open Web Apps, DOM Crypt
まだ不完全な実装の API も一部含む
54. 現在実装中の Web API
WebRTC (Camera, P2P 含む)
Web Activities (Intent)
Push Notification
Power Management
TCP Socket, Bluetooth
FM Radio, Permission
https://wiki.mozilla.org/WebAPI
55. 実装見込みの Web API
UDB Datagram Socket
HTTP-cache, Log
USB, NFC, USB file-reading
Background Service
...and more...
https://wiki.mozilla.org/WebAPI
56. 検討中の WebAPI
Magnetic Field
Time/Clock (時刻設定)
Calendar
Spellcheck
...and more...
57. Web API も Web 標準
W3C DAP (Device API) WG
W3C System Apps WG
IETF/W3C WebRTC WG
マルチメディア系や P2P など
その他それぞれの WG で
66. Firefox OS (Boot to Gecko)
Web 技術が「ネイティブ」
HTML5, JavaScript, Web API...
ホーム画面もすべて Web 技術で
Gecko エンジンだけ起動
Linux Kernel 上に Gecko を
Java VM などの中間レイヤなし
Gecko = Firefox 描画エンジン
プロジェクト名は今も Boot to Gecko
71. Web API の標準化
不足機能は実装&標準化
Web = Native とする
主に W3C の WG で標準化
実装と平行して標準化を進める
Device API, System Apps...
そのほか IETF などでも
https://wiki.mozilla.org/WebAPI