scholarly journals The Apache Qpid XML Exchange

2009 ◽  
Author(s):  
Jonathan Robie
Keyword(s):  
Web Services ◽  
Open Source ◽  
High Performance ◽  
Security Management ◽  
Message Oriented Middleware ◽  
Direct Support ◽  
Solid Foundation ◽  
Mission Critical ◽  
Point To Point ◽  
The Cost

XML is widely used for messaging applications. Message-oriented Middleware (MOM) is a natural fit for XML messaging, but it has been plagued by a lack of standards. Each vendor's system uses its own proprietary protocols, so clients from one system generally can not communicate with servers from another system. Developers who are drawn to XML because it is simple, open, interoperable, language independent, and platform independent often use REST for messaging because it shares the same virtues. When XML developers need high-performance, guaranteed delivery, transactions, security, management, asynchronous notification, or direct support for common messaging paradigms like point-to-point, broadcast, request/response, and publish/subscribe, they have been forced to sacrifice some of the virtues that drew them to XML in the first place. Java JMS is an API, defined only for Java, and it does not define a wire protocol that would allow applications running on different platforms or written in different languages to interoperate. SOAP and Web Services offer interoperability if the same underlying protocols are used and if the same WSI-protocol is used by all parties, but at the cost of more complexity than a MOM system. And as the basic components of enterprise messaging have been added piece by piece to the original specifications, Web Services have become complex, defined in a large number of overlapping specifications, without a coherent and simple architecture. The new Advanced Message Queueing Protocol (AMQP) is an open, language independent, platform independent standard for enterprise messaging. It provides precisely the coherent and simple architecture that has been missing for sophisticated messaging applications. Red Hat Enterprise MRG includes a multi-language, multi-platform, open source implementation of AMQP. We develop the messaging component as part of the upstream Apache Qpid project. In order to meet the needs of XML messaging systems, we contributed the Apache Qpid XML Exchange, which provides XQuery-based routing for XML content and message properties. Together, AMQP, Apache Qpid, and the Qpid XML Exchange provide a solid foundation for mission critical XML messaging applications.

scholarly journals Assembling cheap, high-performance microphones for recording terrestrial wildlife: the Sonitor system

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 1984 ◽  
Author(s):  
Kevin Darras ◽  
Bjørn Kolbrek ◽  
Andreas Knorr ◽  
Volker Meyer
Keyword(s):  
Open Source ◽  
High Performance ◽  
Transmission Loss ◽  
Signal Loss ◽  
Trade Offs ◽  
Technical Specifications ◽  
Sound Amplification ◽  
Passive Acoustic ◽  
The Cost ◽  
Acoustic Horns

Passive acoustic monitoring of wildlife requires microphones. Several cheap, high-performance open-source solutions currently exist for recording sounds, but all of them are still reliant on commercial microphones. Commercial microphones are relatively expensive, specialized on particular taxa, and often have opaque technical specifications. We designed Sonitor, an open-source microphone system to address all needs of ecologists that sample terrestrial wildlife acoustically. We evaluated the cost of our system and measured trade-offs that are seldom acknowledged but which universally limit microphones' functions: weatherproofing versus sound attenuation, windproofing versus transmission loss after rain, signal loss in long cables, and analog sound amplification and directivity with acoustic horns. We propose three microphone configurations suiting different budgets, sound qualities, and flexibility requirements, which all cover the entire sound frequency spectrum of sonant terrestrial wildlife at a fraction of the cost of commercial microphones.

scholarly journals Performance Evaluation and Comparison of Distributed Messaging Using Message Oriented Middleware

2014 ◽  
Vol 7 (4) ◽  
pp. 9 ◽  
Author(s):  
Sanjay P. Ahuja ◽  
Naveen Mupparaju
Keyword(s):  
Open Source ◽  
Asynchronous Communication ◽  
Synchronous Communication ◽  
Enabling Technology ◽  
Enterprise Integration ◽  
Message Oriented Middleware ◽  
Point To Point ◽  
The Right ◽  
Work Done ◽  
Source Message

Message Oriented Middleware (MOM) is an enabling technology for modern event-driven applications that are typically based on publish/subscribe communication (Eugster, 2003). Enterprises typically contain hundreds of applications operating in environments with diverse databases and operating systems. Integration of these applications is required to coordinate the business process. Unfortunately, this is no easy task. Enterprise Integration, according to the authors in (Brosey et al, 2001), "aims to connect and combines people, processes, systems, and technologies to ensure that the right people and the right processes have the right information and the right resources at the right time”. Communication between different applications can be achieved by using synchronous and asynchronous communication tools. In synchronous communication, both parties involved must be online (for example, a telephone call), whereas in asynchronous communication, only one member needs to be online (email). Middleware is software that helps two applications communicate with one another. Remote Procedure Calls (RPC) and Object Request Brokers (ORB) are two types of synchronous middleware—when they send a request they must wait for an immediate reply. This can decrease an application’s performance when there is no need for synchronous communication. Even though asynchronous distributed messaging using message oriented middleware is widely used in industry, there is not enough work done in evaluating the performance of various open source Message oriented middleware. The objective of this work was to benchmark and evaluate three different open source MOM’s performance in publish/subscribe and point-to-point domains, and provide a functional comparison and qualitative study from developers perspective.

scholarly journals Assembling cheap, high-performance microphones for recording terrestrial wildlife: the Sonitor system

F1000Research ◽  
2019 ◽  
Vol 7 ◽  
pp. 1984
Author(s):  
Kevin Darras ◽  
Bjørn Kolbrek ◽  
Andreas Knorr ◽  
Volker Meyer ◽  
Mike Zippert
Keyword(s):  
Open Source ◽  
High Performance ◽  
Transmission Loss ◽  
Signal Loss ◽  
Trade Offs ◽  
Technical Specifications ◽  
Sound Amplification ◽  
Passive Acoustic ◽  
The Cost ◽  
Acoustic Horns

Passive acoustic monitoring of wildlife requires sound recording systems. Several cheap, high-performance open-source solutions currently exist for recording soundscapes, but all of them are still reliant on commercial microphones. Commercial microphones are relatively expensive, specialized for particular taxa, and often have incomplete technical specifications. We designed Sonitor, an open-source microphone system to address all needs of ecologists that sample terrestrial wildlife acoustically. We evaluated the cost and durability of our system and measured trade-offs that are seldom acknowledged but which universally limit microphones' functions: weatherproofing versus sound attenuation, windproofing versus transmission loss after rain, signal loss in long cables, and analog sound amplification versus directivity with acoustic horns. We propose five microphone configurations suiting different budgets (from 8 to 33 EUR per unit), and fulfilling different sound quality and flexibility requirements. The Sonitor system consists of sturdy acoustic sensors that cover the entire sound frequency spectrum of sonant terrestrial wildlife at a fraction of the cost of commercial microphones.

scholarly journals Assembling cheap, high-performance microphones for recording terrestrial wildlife: the Sonitor system

F1000Research ◽  
2021 ◽  
Vol 7 ◽  
pp. 1984
Author(s):  
Kevin Darras ◽  
Bjørn Kolbrek ◽  
Andreas Knorr ◽  
Volker Meyer ◽  
Mike Zippert ◽  
...  
Keyword(s):  
Open Source ◽  
High Performance ◽  
Transmission Loss ◽  
Signal Loss ◽  
Trade Offs ◽  
Technical Specifications ◽  
Sound Amplification ◽  
Passive Acoustic ◽  
The Cost ◽  
Acoustic Horns

Passive acoustic monitoring of wildlife requires sound recording systems. Several cheap, high-performance, or open-source solutions currently exist for recording soundscapes, but all rely on commercial microphones. Commercial microphones are relatively expensive, specialized for particular taxa, and often have incomplete technical specifications. We designed Sonitor, an open-source microphone system to address all needs of ecologists that sample terrestrial wildlife acoustically. We evaluated the cost and durability of our system and measured trade-offs that are seldom acknowledged but which universally limit microphones' functions: weatherproofing versus sound attenuation, windproofing versus transmission loss after rain, signal loss in long cables, and analog sound amplification versus directivity with acoustic horns. We propose five microphone configurations suiting different budgets (from 8 to 33 EUR per unit), and fulfilling different sound quality and flexibility requirements. The Sonitor system consists of sturdy acoustic sensors that cover the entire sound frequency spectrum of sonant terrestrial wildlife at a fraction of the cost of commercial microphones.

An open source high-performance solution to extract surface water drainage networks from diverse terrain conditions

2017 ◽  
Vol 45 (4) ◽  
pp. 319-328 ◽  
Author(s):  
Lawrence V. Stanislawski ◽  
Kornelijus Survila ◽  
Jeffrey Wendel ◽  
Yan Liu ◽  
Barbara P. Buttenfield
Keyword(s):  
Surface Water ◽  
Open Source ◽  
High Performance ◽  
Water Drainage ◽  
Drainage Networks

Based on Numerical Simulation of High-Performance Parallel Machine Muffler Experimental Calibration

2013 ◽  
Vol 718-720 ◽  
pp. 1645-1650
Author(s):  
Gen Yin Cheng ◽  
Sheng Chen Yu ◽  
Zhi Yong Wei ◽  
Shao Jie Chen ◽  
You Cheng
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Boundary Element ◽  
Message Passing ◽  
High Performance ◽  
Message Passing Interface ◽  
Parallel Machine ◽  
Simulation Software ◽  
Experimental Calibration ◽  
The Cost

Commonly used commercial simulation software SYSNOISE and ANSYS is run on a single machine (can not directly run on parallel machine) when use the finite element and boundary element to simulate muffler effect, and it will take more than ten days, sometimes even twenty days to work out an exact solution as the large amount of numerical simulation. Use a high performance parallel machine which was built by 32 commercial computers and transform the finite element and boundary element simulation software into a program that can running under the MPI (message passing interface) parallel environment in order to reduce the cost of numerical simulation. The relevant data worked out from the simulation experiment demonstrate that the result effect of the numerical simulation is well. And the computing speed of the high performance parallel machine is 25 ~ 30 times a microcomputer.

Digital monitoring system of equipment for the analysis of fuel and lubricants quality

2021 ◽  
Vol 04 (1) ◽  
pp. 54-54
Author(s):  
V. R. Nigmatullin ◽  
◽  
I. R. Nigmatullin ◽  
R. G. Nigmatullin ◽  
A.M. Migranov ◽  
...  
Keyword(s):  
Monitoring System ◽  
High Performance ◽  
Chemical Elements ◽  
Large Data ◽  
Climatic Conditions ◽  
Point Of View ◽  
Friction Units ◽  
Digital Monitoring ◽  
Wear Products ◽  
The Cost

Currently, to increase the efficiency of industrial production, high-performance and expensive technological equipment is increasingly used, in which the weakest link, from the point of view of efficiency and reliability, is the components and parts of heavily loaded tribo – couplings operating both at significantly different temperatures (conditionally under lighter conditions, the temperature difference can be 100-120 degrees) and climatic conditions (high humidity, the presence of abrasives and other chemical elements in the atmosphere). As the results of the analysis of the frequency of failures of friction units and, accordingly, the cost of their restoration reach 9-20 percent of the cost of all equipment, without taking into account significant losses of income (profit) of the enterprise from downtime. The solution of this problem is based on the study of the wear rate of friction units by the wear products accumulated in working oils, cooling lubricants, and greases. A digital equipment monitoring system (DSMT) has been developed and implemented, which includes dynamic recording of the number of wear products and oil temperature by original modern recording devices, followed by the technology of their processing and use. The system also includes methods for finding the necessary information in large data sets useful and necessary in theoretical and practical terms with a similar technique controlled by a digital monitoring system. The advantages of SMT are the ability to predict the reliability of the equipment; reduce production risks and significantly reduce inefficient costs.

A cloud-based approach to library management solution for college libraries

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jitendra Nath Shaw ◽  
Tanmay De Sarkar
Keyword(s):  
Shared Environment ◽  
Infrastructure As A Service ◽  
Web Based ◽  
Content Type ◽  
Delivery Model ◽  
Library Management ◽  
Skilled Manpower ◽  
College Libraries ◽  
Point To Point ◽  
The Cost

Purpose The study aims to focus on the present automation status of the college libraries with an objective to offer enhanced Web-based library service on an affordable virtualization on cloud computing model. Design/methodology/approach With Infrastructure as a Service (Infrastructure as a Service) delivery model, this study demonstrates how libraries of colleges/smaller institutes could be connected to cloud Library Management System infrastructure through internet or dedicated point-to-point WAN connectivity. The Software as a Service (SaaS) delivery model depicts how college libraries could form library consortium at its own private cloud environment with installation of the required LMS application, database, middleware and other prerequisites. Findings A cloud-based consortium approach for the college libraries will reduce the cost of purchasing hardware equipment and setting up of infrastructural facilities; relieve libraries of involving additional IT skilled manpower; foster collaborative approach with shared environment and minimise duplication in resource subscription. Originality/value To the best of the authors’ knowledge, the present study is the first of its kind in the light of shifting of infrastructure, software and hardware requirements of smaller libraries for cooperative sharing in both IaaS and SaaS cloud platform. The study delineates step by step how college libraries could effectively leverage the cooperative cloud architecture for enhanced library services to reach wider user community.

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