Let's dive under the hood of Java network applications. We plan to have a deep look to classic sockets and NIO having live coding examples. Then we discuss performance problems of sockets and find out how NIO can help us to handle 10000+ connections in a single thread. And finally we learn how to build high load application server using Netty.
https://github.com/kslisenko/java-networking
Let's dive under the hood of Java network applications. We plan to have a deep look to classic sockets and NIO having live coding examples. Then we discuss performance problems of sockets and find out how NIO can help us to handle 10000+ connections in a single thread. And finally we learn how to build high load application server using Netty.
https://github.com/kslisenko/java-networking
ExaProxy is an HTTP proxy allowing its users to modify requested page, like SQUID redirectors, with forked helpers, but provide the same level of control as ICAP. It supports HTTPS (through CONNECT) and the HAPROXY protocol.
All of Your Network Monitoring is (probably) Wrongice799
Monitorama 2016 talk about network monitoring covering topics like network device drivers, ethtool, and some interesting bugs/features.
For more information about monitoring and tuning the entire Linux network stack, see: blog.packagecloud.io/eng/2016/06/22/monitoring-tuning-linux-networking-stack-receiving-data/
You can create and test your OFC with Trema.
You can create tests effectively with test frameworks.
You can run common tests for both environment of a testing network and a real network.
This talk explains the installation and configuration of a Linux high availability network gateway using keepalived and conntrackd. This results in an active-standby topology. Necessary scripts are implemented to keep the configuration in sync of both gateways. Keepalived is used to manage active-standby negotiation. Conntrackd is used to synchronize network states across the gateways.
A quick introduction to Python's Twisted networking library, given at a NZPUG meeting in April 2009.
Covers some of the stuff you can do with Twisted really easily, like an XMPP bot and an SSH/Telnet shell into your running applications.
Taking Security Groups to Ludicrous Speed with OVS (OpenStack Summit 2015)Thomas Graf
Open vSwitch (OVS) has long been a critical component of the Neutron's reference implementation, offering reliable and flexible virtual switching for cloud environments.
Being an early adopter of the OVS technology, Neutron's reference implementation made some compromises to stay within the early, stable featureset OVS exposed. In particular, Security Groups (SG) have been so far implemented by leveraging hybrid Linux Bridging and IPTables, which come at a significant performance overhead. However, thanks to recent developments and ongoing improvements within the OVS community, we are now able to implement feature-complete security groups directly within OVS.
In this talk we will summarize the existing Security Groups implementation in Neutron and compare its performance with the Open vSwitch-only approach. We hope this analysis will form the foundation of future improvements to the Neutron Open vSwitch reference design.
You got a network to take care of. How would you know what is on it? For years, people in the know used bro network monitoring to answer those questions. Now it's time to take a look what you can find out about your network if you wanted to be local big brother.
Es gibt viele Möglichkeiten hoch verfügbare und/oder skalierbare Dienste zu bauen, die weitläufig im Einsatz sind: DNS Round-Robin, ein Satz Loadbalancer oder Reverse-Proxies, etc. pp. An Anycast und BGP im eigenen Rechenzentrum trauen sich einige Admins und Entscheider nicht heran.
Warum es OK ist, wenn einige bis viele Server die selbe IP-Adresse haben, viele Wege nach Rom führen und wie man so ein Setup aufbaut und betreibt soll in diesem Vortrag praxisnah gezeigt werden. Wir bauen auf Basis von Debian Linux, Bird und Bind einen Cluster von Webservern und spielen ein bisschen damit herum (wenn noch genug Zeit ist).
Athens IT Professionals Meetup discussing Network Layers and Protocols. Brandon Checketts walks through academic understanding of the 7-layer OSI Model, with sample packet captures of some common network communications.
ExaProxy is an HTTP proxy allowing its users to modify requested page, like SQUID redirectors, with forked helpers, but provide the same level of control as ICAP. It supports HTTPS (through CONNECT) and the HAPROXY protocol.
All of Your Network Monitoring is (probably) Wrongice799
Monitorama 2016 talk about network monitoring covering topics like network device drivers, ethtool, and some interesting bugs/features.
For more information about monitoring and tuning the entire Linux network stack, see: blog.packagecloud.io/eng/2016/06/22/monitoring-tuning-linux-networking-stack-receiving-data/
You can create and test your OFC with Trema.
You can create tests effectively with test frameworks.
You can run common tests for both environment of a testing network and a real network.
This talk explains the installation and configuration of a Linux high availability network gateway using keepalived and conntrackd. This results in an active-standby topology. Necessary scripts are implemented to keep the configuration in sync of both gateways. Keepalived is used to manage active-standby negotiation. Conntrackd is used to synchronize network states across the gateways.
A quick introduction to Python's Twisted networking library, given at a NZPUG meeting in April 2009.
Covers some of the stuff you can do with Twisted really easily, like an XMPP bot and an SSH/Telnet shell into your running applications.
Taking Security Groups to Ludicrous Speed with OVS (OpenStack Summit 2015)Thomas Graf
Open vSwitch (OVS) has long been a critical component of the Neutron's reference implementation, offering reliable and flexible virtual switching for cloud environments.
Being an early adopter of the OVS technology, Neutron's reference implementation made some compromises to stay within the early, stable featureset OVS exposed. In particular, Security Groups (SG) have been so far implemented by leveraging hybrid Linux Bridging and IPTables, which come at a significant performance overhead. However, thanks to recent developments and ongoing improvements within the OVS community, we are now able to implement feature-complete security groups directly within OVS.
In this talk we will summarize the existing Security Groups implementation in Neutron and compare its performance with the Open vSwitch-only approach. We hope this analysis will form the foundation of future improvements to the Neutron Open vSwitch reference design.
You got a network to take care of. How would you know what is on it? For years, people in the know used bro network monitoring to answer those questions. Now it's time to take a look what you can find out about your network if you wanted to be local big brother.
Es gibt viele Möglichkeiten hoch verfügbare und/oder skalierbare Dienste zu bauen, die weitläufig im Einsatz sind: DNS Round-Robin, ein Satz Loadbalancer oder Reverse-Proxies, etc. pp. An Anycast und BGP im eigenen Rechenzentrum trauen sich einige Admins und Entscheider nicht heran.
Warum es OK ist, wenn einige bis viele Server die selbe IP-Adresse haben, viele Wege nach Rom führen und wie man so ein Setup aufbaut und betreibt soll in diesem Vortrag praxisnah gezeigt werden. Wir bauen auf Basis von Debian Linux, Bird und Bind einen Cluster von Webservern und spielen ein bisschen damit herum (wenn noch genug Zeit ist).
Athens IT Professionals Meetup discussing Network Layers and Protocols. Brandon Checketts walks through academic understanding of the 7-layer OSI Model, with sample packet captures of some common network communications.
On January 11, 2018, Sony Corporation released aibo (https://aibo.sony.jp/). aibo that is back on market beyond the time of 12 years constructed via robotics framework named ROS. In this presentation, we introduce examples of development in aibo from the point of view of ROS, starting with introduction of aibo, architecture, embedded technology, real-time optimization, robot development environment, simulation etc.
Welcome to the second webinar in the "Taming the Dragon" series about Zenoh and its use for robotics, autonomous vehicle and Internet-scale HPC communities.
What is Zenoh?
Zenoh is a Pub/Sub/Query protocol that unifies data in motion, data at rest and computations from embedded microcontrollers up to data centers.
In this webinar, Luca Cominardi, our Product Conductor here at ZettaScale Technology, talks about how you can get started with Zenoh. You can read more about Zenoh and give it a try here: https://www.zettascale.tech/product/zenoh
Stay up to date with the latest news:
Twitter: https://twitter.com/zettascaletech
LinkedIn: https://www.linkedin.com/company/zettascaletech/
Website: https://www.zettascale.tech/
Newsletter: http://eepurl.com/igPw31
Basic introduction to HTTP/2, and how it can help to speed up SAP Fiori applications. Presented at the 2017 SAP Inside Track Silicon Valley #sitSV, and at SAP TechEd in Las Vegas as session NET52433.
Hello, My name is Kensei Demura.
I'm going to talk about my robots made in RoboCup.
I have been working on RoboCup project since 2011.
At my early ages, I was working on RoboCup Junior.
These are the robots I made in 2011, when I was 7/8th grader.
I studied about omni drive system, and implemented the embedded control system software and the robot hardware by myself.
This robot was 3rd place at the RoboCup Junior 2011 Regional cup.
I continued to enhance my robot.
3 great enhancement.
I made my robot more lightweight.
I developed a single motor ball kicker/dribbler system using ratchet drive.
I made a positioning system using directional sensor and supersonic sensors.
At 2012, I upgraded my robot computing unit, motors, and implemented realtime control.
I changed the embedded computer of my robot, from PIC microcontrollers to AVR microcontrollers.(arduino)
I made arduino middleware library of the communication system with the proprietary motor driver.
I used cached sensor input data and update sensor data at few loops to achieve realtime control of the robot.
I did a match with a Chinese company soccer robot.
This robot ranked 16th place at the RoboCup Junior 2012 National Cup.
At 2013, I enhanced my robot durability and design using CAD design and CNC machining.
To achieve both durability and lightweight, I used locking bar mechanism, duralumin and polycarbonate for chassis.
To reduce the shock coming to the microcontroller, I put a damper underneath the microcontroller.
This robot ranked 16th place at the RoboCup Junior 2013 National Cup.
From 2014, I'm working on RoboCup@home league.
This is Happy Mini.
Happy Mini is a happy autonomous home support for children and elderly.
Happy Mini ranked 8th place in the world, in this July.
I'm developing the Happy Mini artificial intelligence.
I am going to tell Happy Mini's 3 main functionality.
Happy Mini is the world first robot to read books.
Happy Mini can recognize you, your gender, and where you are.
Happy Mini can listen to your voice and chat with you.
I made the system software to read books.
I made the human recognition system of Happy Mini.
I made the language understanding system and sound localization system.
Also, Happy Mini can track you and understand your home terrain and make a map.
I'm also working on the simulator of Happy Mini.
That's all for my presentation.
Thank you.
Hello, My name is Kensei Demura.
I'm going to talk about my robots made in RoboCup.
I have been working on RoboCup project since 2011.
At my early ages, I was working on RoboCup Junior.
These are the robots I made in 2011, when I was 7/8th grader.
I studied about omni drive system, and implemented the embedded control system software and the robot hardware by myself.
This robot was 3rd place at the RoboCup Junior 2011 Regional cup.
I continued to enhance my robot.
3 great enhancement.
I made my robot more lightweight.
I developed a single motor ball kicker/dribbler system using ratchet drive.
I made a positioning system using directional sensor and supersonic sensors.
At 2012, I upgraded my robot computing unit, motors, and implemented realtime control.
I changed the embedded computer of my robot, from PIC microcontrollers to AVR microcontrollers.(arduino)
I made arduino middleware library of the communication system with the proprietary motor driver.
I used cached sensor input data and update sensor data at few loops to achieve realtime control of the robot.
I did a match with a Chinese company soccer robot.
This robot ranked 16th place at the RoboCup Junior 2012 National Cup.
At 2013, I enhanced my robot durability and design using CAD design and CNC machining.
To achieve both durability and lightweight, I used locking bar mechanism, duralumin and polycarbonate for chassis.
To reduce the shock coming to the microcontroller, I put a damper underneath the microcontroller.
This robot ranked 16th place at the RoboCup Junior 2013 National Cup.
From 2014, I'm working on RoboCup@home league.
This is Happy Mini.
Happy Mini is a happy autonomous home support for children and elderly.
Happy Mini ranked 8th place in the world, in this July.
I'm developing the Happy Mini artificial intelligence.
I am going to tell Happy Mini's 3 main functionality.
Happy Mini is the world first robot to read books.
Happy Mini can recognize you, your gender, and where you are.
Happy Mini can listen to your voice and chat with you.
I made the system software to read books.
I made the human recognition system of Happy Mini.
I made the language understanding system and sound localization system.
Also, Happy Mini can track you and understand your home terrain and make a map.
I'm also working on the simulator of Happy Mini.
That's all for my presentation.
Thank you.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
CW RADAR, FMCW RADAR, FMCW ALTIMETER, AND THEIR PARAMETERSveerababupersonal22
It consists of cw radar and fmcw radar ,range measurement,if amplifier and fmcw altimeterThe CW radar operates using continuous wave transmission, while the FMCW radar employs frequency-modulated continuous wave technology. Range measurement is a crucial aspect of radar systems, providing information about the distance to a target. The IF amplifier plays a key role in signal processing, amplifying intermediate frequency signals for further analysis. The FMCW altimeter utilizes frequency-modulated continuous wave technology to accurately measure altitude above a reference point.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
9. ROS Technical Overview
・ Message : XML-RPC(HTTP-based)
・ runs through TCP usually
・ The namesystem of process called “Master”
manages the services
http://wiki.ros.org/ROS/Technical%20Overview
10. 1. a service register a Name to the Master
2. a service query other services through Master
3. a service establishes TCP/IP connection with other
services
4. the services exchange the connection header
5. a service require the serialized message
6. the other service respond with the serialized message
Connection of ROS
Node(Process/Service)
24. Negative effects
1. Remote Control is possible just by
spoofing packets
2. How to spoof packets : TCP Spoofing
3. The robots nowadays connect to the
Internet → critical problem for robots
25. Solution
SSH,IPSec,SLL/TLS Encryption
Problem ： Slow for Robot Control
→Needs of fast encryption
※Using IPSec,VPN make network connection more
than 6 times slower
http://d.hatena.ne.jp/nori_no/20100919/1284875253
※ROS XML-RPC Packet length is about
400~600 bytes(496±99.8 bytes)
(by my calculation & datasets)
