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Modern Pcb Design – A Revolution In Technology

Posted on 2nd April 2011 in Pcb Design

Modern Pcb Design – A Revolution In Technology

Cadence pcb design tools are typical of the software used by design companies today. They vary from low-cost tools suitable for individual pcb designers and small layout teams, to Cadence Allegro â one of the most popular systems in use today, with a range of options for designing integrated circuits, pcbâs and packages.

The Cadence Allegro pcb design layout and routing platform is electrical and physical constraint driven, meaning it is ideal for todayâs intricate micro-circuitry layouts. User friendly, it contains everything the engineer needs to create complex printed circuit boards â from initial concepts onwards. It offers a smooth, integrated design flow which design creation and layout; interactive routing; editing capabilities and library creation. It also features manufacturing and mechanical CAD interfaces, allowing seamless integration of one area of a project into the next. The design partitioning makes it suitable for large, widely dispersed teams of engineers.

Pcb design services often utilise more than one platform, so itâs essential the user interface of each is comprehensive and easy to use. The Allegro is both intuitive and consistent, which is why it is so popular with design services like us at Concept Cad. Push-shove editing, optional global route environment technology, interactive component placement and constraint-driven design flow management are just some of the features it incorporates.

Modern designers are looking for solutions that allow them to build dense, complex printed circuit boards with high-speed interfaces and advanced configurations. Intelligent, automated planning and routing is a big plus. The Cadence Allegro delivers all this and more â which is why itâs so popular with professional pcb layout services.

The Article is written by conceptcad.com providing pcb design and pcb design services Services. Visit http://www.conceptcad.com for more information on conceptcad.com Products & Services___________________________Copyright information This article is free for reproduction but must be reproduced in its entirety, including live links & this copyright statement must be included. Visit conceptcad.com for more services!

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Specification-Based Test Design Techniques as per ISTQB Advanced Level Syllabus

Posted on 2nd April 2011 in Technical Testing

by ianmunroe

Specification-Based Test Design Techniques as per ISTQB Advanced Level Syllabus

Specification-Based Test Design Techniques as per ISTQB Advanced Level Syllabus

Test analysts and technical test analysts lay major attention to design, implementation and execution of tests using various testing techniques. Specification-based techniques are one of such techniques.

Specification-based techniques are popular by more refined names like behavior-based techniques or Black Box test design techniques. These techniques can be used for any level of test activity. These are used by both test analysts and technical test analysts, but exploited mainly by the test analysts.

Code is designed and developed from the software requirement’s specifications (SRS) documents being the primary input documents. Likewise specification-based test techniques too are based upon the test conditions & test cases derived from the SRS documents.

We can make our specifications that can be in the form of text documents, pictures, models, compilation of features, or any other document which could help us in understanding as to what we expect from the software & how it is going to accomplish that.

Test coverage is represented by the percentage of the specified items addressed by the designed tests. Coverage of all the specified items does not necessarily indicate complete test coverage, but it does indicate that we have addressed what was specified. For further coverage, we may need to look for additional information.

ISTQB Advanced Level syllabus addresses following seven types of specification-based techniques

1) Equivalence Partitioning:

Brief Description: It involves grouping of test conditions into various partitions, which are handled in the same way.

Coverage Criteria: Number of Coverage Partitions / Total No. of Partitions

2) Boundary Value Analysis (BVA):

Brief Description: It involves defining boundaries of the partitions & testing for them thereafter.

Coverage Criteria: Number of Distinct Boundary Values covered / Total No. of Boundary Values

3) Decision table testing / cause-effect graphing:

Brief Description: It involves defining & testing for different combinations of conditions.

Coverage Criteria: Number of combinations of conditions covered / Maximum No. of combinations of conditions

4) State transition Tables:

Brief Description: It involves Identification of all types of valid states & transitions, which need to be tested.

Coverage Criteria: For single transitions, the coverage metrics is the percentage of all valid transitions exercised during test. This is known as 0-switch coverage. For n-transitions the coverage measure is the percentage of all valid sequences of n-transitions exercised during the test. This is known as (n-1) switch coverage

5) All pair testing / Orthogonal Array Testing:

Brief Description: It involves Identification of various combinations of configurations that need to be tested.

6) Classification Tree Method:

Brief Description: It involves the use of graphical notations to describe the classes or test conditions and combinations handled by the test cases.

Coverage Criteria: It depends upon the technique applied, e.g. pair wise is distinct from classification trees.

7) Use Case Testing:

Brief Description: It involves Identification of various usage scenarios & then testing accordingly.

Coverage Criteria: No formal criteria apply.

Sometimes one or more of these techniques are combined to create our tests. For example, the conditions identified in a decision table might be subjected to equivalence partitioning to discover multiple ways in which a condition might be satisfied. Tests would then cover not only every combination of conditions, but also, for those conditions which are partitioned, additional tests would be generated to cover the equivalence partitions.

http://www.softwaretestinggenius.com A Storehouse of Complete Knowledge on Software Testing & QA under one Roof

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Automist is the first automatic fire suppression system that integrates seamlessly into existing homes. A reliable and cost-effective solution, Automist targets at-risk rooms such as the kitchen, where most fires start. Unlike other fire suppression systems, Automist can berun from a standard domestic mains water supply, installing almost invisibly underneath a standard tap. Installation disruption is minimal and annual maintenance involves only a simple and quick test. Automist uses well established water mist technology to protect life and property, whilst minimizing the potential for water damage. Detection is based on industry standard heat detectors as recommended in Approved Document B, effectively eliminating nuisance alarms. Testing has shown that Automist can extinguish small fires and greatly impedes the development of very serious fires. In one of the most comprehensive test suite ever run on a mist product at the BRE, Automist was found to prevent death in a major furniture fire for the entire test period of 30 minutes, even for those trapped in the room.
Video Rating: 5 / 5

How to Design With Large Rugs

Posted on 12th March 2011 in Large Rugs

by walksbyfaith

How to Design With Large Rugs

How to Design With Large Rugs

Large rugs are stately, regal, impressive, and above all fun to decorate with: Providing the following tips are utilized.

Steps
Always start with the rug.
Decide on a size that would be suitable by laying out newspaper. Generally 2 to 3 feet from each wall, or follow standard large rug sizes of 9×12, 10×14, 12×15, 12×18 and 12×20
Shopping by price is not the best way to search. A large rug will be with you for generations. Every carpet is unique, so the carpet that speaks to your style and decor is the one that should be chose.
View as many rugs as possible online and in person to determine styles you like. The more carpets you see in person at a local or online rug gallery and have the opportunity to feel with your hands, the easier your selection will become, and the more defined your taste.
Tips
Deciding between medallion and an allover pattern is easy -if there is a lot of furniture to be placed in the room, especially in the center, you may want to opt for an allover repeating pattern.
Walk on your large rugs with socks. This will slowly polish the wool over time to give it a healthy sheen.
Rotate your large rug or carpet once every few years to help evenly distribute wear or traffic patterns.
Always carefully spot clean a carpet with proper care and attention to efficient and non invasive cleaning guidelines. Try this stain guide
Sources and Citations

http://largerugscarpets.com

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comments: 0 » tags: Design, Large, Rugs

Structural Engineering for 3D Steel Building Design

Posted on 11th March 2011 in Structural Engineer

by AIDG

Structural Engineering for 3D Steel Building Design

The structural engineering is a field of technology treating the structural analysis and the structural design which support or resist loads economically. The structural engineering is usually considered a speciality in civil engineering and structural steel detailing.

Structural engineers frequently expertise in particular fields, such as bridge engineering, steel buildings engineering, pipeline engineering, industrial structures or special structures. Structural engineering design services includes various significant element such as beams, walls, column and floor, because structural design and analysis is essentially responsible for 3D building structural design.

Structural steel building engineering design includes all structural engineering related to the 3D design of buildings. It is the division of structural engineering that is close to architecture. The 3D structural design for a building must guarantee that the building is able to stand up securely, able to function without extreme deflections or movements that may cause exhaustion of structural elements, cracking or failure of fixtures, fittings or partitions, or discomfort for occupants. The 3D structural design of modern buildings can be extremely difficult, and often requires a large team to complete.

Structural engineering specialties for buildings include:
â¢ Earthquake Engineering
â¢ Facade Engineering
â¢ Fire Engineering
â¢ Roof Engineering
â¢ Tower Engineering
â¢ Wind Engineering

Structural engineers examine 3d steel buildings during and after building construction and supervise the use of the concrete, steel and timber of which they are completed. They must also be conscious of both noticeable and imperceptible uses for the structures and how these uses affect its 3d structural design.

Structural engineers analyze, design, plan and research structural components and structural systems. Structural engineer can choose which construction method should be used to present a most constructive 3d building design that is easy to implement and cost-effective. A high-quality 3D structural design engineer can save your money, time and efforts.

Every building construction project requires a structural engineer to utilize diverse examine. Structural engineers are responsible for 3d building design and efficient use of funds, structural elements and materials to achieve these goals. For more information, please visit http://www.structuralcaddservices.com

Structural CADD Services is a leading structural engineering firm of structural design and 3d steel building design. For more information about cost effective structural design and analysis, please visit at: http://www.structuralcaddservices.com or contact us at: info@structuralcaddservices.com

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comments: 0 » tags: Building, Design, Engineering, Steel, Structural

3D Renderings Architectural Breathes New Life into Construction Design

Posted on 12th February 2011 in 3d Rendering

by therichardlife

3D Renderings Architectural Breathes New Life into Construction Design

The architectural designs have got a new meaning with the introduction & use of 3d render & mapping service. These advance visualization methods has brought about a sea change in the way construction designs were used to be visualized earlier. The 3d render service has enabled us to have access to better visualization, real looking 3d rendering architectural, better layout design, efficient design management without any fault & inexpensive construction design within less possible time.

The 3d renderings architectural service is targeted to present the architectural designs in the 3d virtual form & the concerned designs look lively. The architectural 3d render service ensures improvement in the communication & design value. It facilitates the real estate developers, architectures & stakeholders to understand the basics & grasp the design layout faster.

Basically 3d rendering architectural is the best option one can use to beautify his/her construction project & dispose of it faster. In fact the 3d render is emerging as one of the powerful visualization tools that can enhance the initial project design & make it appear to the clients & share holders exactly the same as they would look after they have been built.

The 3d renderings architectural take into account every real life elements such as people, vegetation, color, texture, lighting & surroundings to the rendering process to make designs look like real. The interior designers, contractors, architects & property developers are widely using some of the common CAD software technologies including 3D Max, Adobe Photoshop, ArchiCAD & Revit Architecture for giving 3d render finishing. These 3d renderings architectural software are greatly used as promotional tools in advertisements & brochures.

The addition of advance CAD software & technology has led to the withdrawal of conventional hand drawn 3d renders from the architectural design making process. To increase the value of their designs & make them more appealing to clients, architects are opting for 3d renderings architectural service to develop look real images. These images are prepared using either a full scale architectural walkthrough/flythrough & photo-realistic visual technology in a digital platform.

The architectural 3d render designs offer benefits like superior quality, accurate detailing & drawing of more number of vantage points resulting in better communication. Their application areas include office architectural renderings, furniture 3d rendering, 3d interior design, interior architectural 3d rendering & much more. The 3d render visualization centers around floor designs, landscape design, hotel exterior & interior renderings, site plan walkthrough/flythrough. The 3d product renderings have huge potential that they can relate to a layman instantly.

Allen joy providing 3D interior designers

3d presentation

3d rendering

3d render

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In this tutorial, I will show you how to change the rendering method in 3d studio max. CONTENT: How to change the way how looks the viewports: – Smooth and high Lights – WIreframe (1:51) – Short cut to change between the methods of “Smooth and High Lights” and “Wireframe” (2:22) – How turn on / off the Edged Faces (2:37) – How to adjust the transparency(3:08) Other Methods: – Smooth (3:36) – Facets and high lights (4:13) – Facets (4:48) – Flat (5:04) – Hidden Line (5:17) – Lit wireframes (5:49) – Bounding Box (5:58) Other way to change the rendering methods, transparency, using the ViewPort Configuration Window (6:31) Other option to configure the rendering methods: (7:01) – Disable the view – Disable the textures (7:23) – Z-buffer (7:33) – Forced 2-sided (7:43) – Default lighting (7:48) – Shade selected faces (7:53) – Use selection Brackets (8:01) – Display selected with edged faces (8:07) – Viewport clipping (8:11) – Fast view Nth Faces (8:23) – Field of view (8:30) For more tutorials: www.macrotutorials.com…
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Vango tents offer a design for every kind of camping trip

Posted on 31st January 2011 in Vango Tents

by Will Cowan

Vango tents offer a design for every kind of camping trip

Vango tents come highly recommended for their quality and design, as well as the wide variety of options available to suit everyone from the first-time camper to the seasoned backpacker or family group.

The Adventure range for instance comprises budget tents in a choice of designs, including tunnel tents such as the Zetes 300 and semi-geodesic structures like the Sigma 300. These tents are excellent value for money and provide a positive introduction to camping.

Popup tents have been becoming more ‘pop’ ular, as those new to camping often find pitching a tent can be awkward and off-putting and sometimes, if a blustery shower moves in, a quick pitch means sitting safely inside the tent instead of struggling with wet, flapping material and poles. Vango’s popup tents range from a beginner’s single-skin version to more sturdy and weatherproof options such as the Dart DS 300. There are also a couple of tepee-style tents, such as the Juno Tepee 300, where there is no separate inner and the emphasis is on simplicity and sociability.

Vango’s Weekend tents are ideal for families or couples having a short break. These tents can sleep from three to eight people depending on the design, and offer different arrangements in terms of living and sleeping compartments. The family can safely slumber in bedrooms laid out next to one another in a tent like the Artemis 600 or, if more privacy is required, they can snore away at opposite ends of the living area in the Breakout 6 DLX. More technical tents in the range, such as the Nevis 600, have an even more waterproof flysheet and use alloy poles instead of steel, making the tent lighter.

If separate sleeping chambers are preferred, the Colorado 600 DLX could be suitable, with its three individual bedroom pods arranged at intervals around a central dome, together with a porch space at one end. Vango’s Premium family tents offer the most space, comfort and flexibility of all, with options such as the Monte Verde 900 sleeping up to nine in a light, airy and customisable structure.

Cotton offers a cooler, more breathable alternative to nylon, and Vango has produced a Classic range using polycotton. The Aruba 600 is one such tent, which also sports alloy poles, a sewn-in groundsheet and a stable tunnel design, providing a delightful camping experience. For the environmentally conscious camper Vango offers an Eco range, with designs such as the Green Bean 350, where almost the entire tent apart from the groundsheet, zippers and poles is manufactured from recycled plastic bottles.

Vango caters for backpackers and those who like to camp in the mountains, with an assortment of strong, lightweight tents ranging from the one person, single skin, Ultralite 100, weighing only one kilo, to the immensely stable Hurricane 200, which should stand up to most conditions the weather can throw at it. At Outdoor World Direct we have found these lightweight tents are popular with participants in the Duke of Edinburgh award scheme.

Emma writes articles on Outdoor World Direct’s <a rel=”nofollow” onclick=”javascript:_gaq.push(['_trackPageview', '/outgoing/article_exit_link']);” href=”http://www.outdoorworlddirect.co.uk/acatalog/tent_section.html” title=”Tents”> tents </a> including product guides on <a rel=”nofollow” onclick=”javascript:_gaq.push(['_trackPageview', '/outgoing/article_exit_link']);” href=”http://www.outdoorworlddirect.co.uk/acatalog/vango_tents.html” title=”Vango tents offer a design for every kind of camping trip”>Vango tents offer a design for every kind of camping trip</a>.

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Comprehending PCB design

Posted on 23rd January 2011 in Pcb Design

by turbojoe (it’s joetime!!!)

Comprehending PCB design

A PCB designer etches, or traces, conductive pathways from copper sheets that have been laminated onto a non-conductive base. This provides an electronic pathway to connect various electronic components together. Together, they are known as a printed circuit board assembly.

PCB layout is a complex and challenging skill. However, the low cost, high reliability, and high-volume speed of PCB design has seen it take over from older methods like point-to-point circuits.

PCB layout has been made a lot easier in recent years with the development of specialised software tools. However, it is still a specialised task needing a high degree of patience and concentration. PCB design services remain dependent on maintaining very high standards.

It is important that the PCB layout is accurate, and the correct board is used. The conducting layers are made of thin copper foil, while the non-conducting, or insulating layers are composed from a variety of different substrates, laminated together with epoxy resin. It is pivotal to choose the right type of substrate as this will affect the insulating properties of the board. Similarly, the width of the trace will affect the resistance of the circuit.

We at Concept CAD employ highly skilled PCB designers and the very latest PCB layout tools, such as Cadence Allegro, to create complex PCB designs for a wide range of applications.

The Article is written by conceptcad.com providing PCB Design and PCB Design Services Products. Visit http://www.conceptcad.com for more information on conceptcad.com Products & Services___________________________
Copyright information
This article is free for reproduction but must be reproduced in its entirety, including live links & this copyright statement must be included. Visit conceptcad.com for more services!

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Comprehending PCB design

Posted on 4th January 2011 in Pcb Design

by DesignSparkRS

Comprehending PCB design

PCB layout is a complex and challenging skill. However, the low cost, high reliability, and high-volume speed of PCB design has seen it take over from older methods like point-to-point circuits.

We at Concept CAD employ highly skilled PCB designers and the very latest PCB layout tools, such as Cadence Allegro, to create complex PCB designs for a wide range of applications.

The Article is written by conceptcad.com providing PCB Design and PCB Design Services Products. Visit http://www.conceptcad.com for more information on conceptcad.com Products & Services___________________________
Copyright information
This article is free for reproduction but must be reproduced in its http://articlesbase.toolbarhome.com/partners/articlesbase/download/articlesbase.xpientirety, including live links & this copyright statement must be included. Visit conceptcad.com for more services!

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How the latest PCB design products are revolutionising the electronics industry

Posted on 8th November 2010 in Pcb Design

by Randomskk

How the latest PCB design products are revolutionising the electronics industry

How the latest PCB design products are revolutionising the electronics industry

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How the latest PCB design products are revolutionising the electronics industry

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Posted: Jan 18, 2010 |Comments: 0

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