Monday, February 21, 2011

CrazyEngineers Forum

CrazyEngineers Forum

CrazyEngineers Forum

Series and Shunt diode Clipper Circuits

Posted: 21 Feb 2011 10:12 AM PST

why in a series clipper diode circuit,during the forward biasing half cycle the voltage across the diode rises according to the input sinosuidal supply whereas in shunt type clipper diode circuit,during the forward biasing half cycle it stuck only to its barrier voltage level????

Easy help here friends

Posted: 21 Feb 2011 06:19 AM PST

What are common fields of civil and mechanical engineering?:confused:

I'm a mechanical engineer student and my partner in one of my classes is a civil engineer student and we need 5 ideas of projects in which mechanical and civil engineers have to work together or need each other.

Cleaning Clothes With Sunlight Instead of Detergent

Posted: 21 Feb 2011 05:00 AM PST

Looks like washing machine manufacturers will have to face a huge sale dip soon! The reason is that people are not going to need washing machines anymore to wash their clothes. The recent developments in the nanotechnology have made this possible. Though nanotechnology is more of a research in the material science field, it is [...]

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Who was that man

Posted: 21 Feb 2011 04:52 AM PST

Two men were standing together when a third man approached. One of the two men greeted the newcomer and when he had left, the man's companion ask, "who was that man?" "Brother and sister I have none, but that man's father is my father's son."

Compact High Temperature Superconducting Cables: Super Cables of the Era?

Posted: 21 Feb 2011 04:10 AM PST

Maximum losses occurring today in our electrical systems are the transmission losses. India has 33% transmission losses. This is because of the gigantic expanse of the country and the inevitable losses in the wires used for transmission. This problem can now be dealt with because we have the compact high temperature superconducting cable technology. Lets [...]

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Geologic Science

Posted: 21 Feb 2011 03:59 AM PST

Could some one help me by sending (Streostat) software to me

mahmud.geology@yahoo.com

Best Regards

Hoffmann + Krippner announce panel pc business expansion

Posted: 21 Feb 2011 03:46 AM PST

February 21st 2011 - Input device specialist Hoffmann + Krippner has announced a further expansion of its global operations with the formation of a new UK subsidiary and the appointment of UK managing director, Ian Ritson.

Based in Cambridge, Hoffmann + Krippner (UK) Ltd will focus on the company's industrial panel PC business, including developing cost-effective custom industrial PC solutions for low- to medium-volume requirements. The UK organisation joins a global network of offices that includes the USA, Germany, Austria, Switzerland and the Netherlands.

Prior to taking up his role as Hoffmann + Krippner's UK managing director, Ian Ritson was the business development manager for display and user interface specialist Anders Electronics. Ritson, who combines a strong engineering and technology background with a proven track record in delivering industrial PC-based solutions, has previously held senior roles with companies such as Accelent Systems, Inc., and Densitron Technologies.

Ritson states: "At Hoffmann + Krippner we have identified an opportunity to take advantage of our position as a leading supplier of innovative membrane input technologies to deliver panel PCs that allow cost-effective front panel customisation for order volumes as low as just 20 pieces. Hoffmann + Krippner UK will focus on developing this business in sectors ranging from medical and pharmaceutical to industrial automation and food processing."

About Hoffman + Krippner
Founded in 1972, Hoffmann + Krippner has become a global leader in the design and development of high-quality and innovative input solutions for a diverse range of industries ranging from electronics and industrial automation to medical, pharmaceuticals and food processing. The company, which has its headquarters in Buchen, Germany, offers a broad portfolio of technologies that ranges from standard membrane keyboards to completely customised input systems encompassing housing, electronics and software.

For further information and reader enquiries please contact:
Ian Ritson
Hoffmann + Krippner Limited
St. John's Innovation Centre
Cowley Road
Cambridge
CB4 0WS
Tel: +44 (0) 1223 421889
E-Mail: i.ritson[at]flex-ipc[dot]co.uk
Web: www.flex-ipc.co.uk

Issued by:
Birgit Schoeniger
Pinnacle Marketing Communications Ltd
Prosperity House
Dawlish Drive
Pinner
Middsx, HA5 5LN
Tel: +44 (0) 20 8429 6554
E-mail: b.schoeniger[at]pinnaclemarcompdot]com
Web: www.pinnacle-marketing.com

Distributed on behalf of Pinnacle Marketing Communications by NeonDrum news distribution service (http://www.neondrum.com)

Need Help In Starting Business

Posted: 21 Feb 2011 03:30 AM PST

sir my self sawan agrawal i m from raipur and i doing engineering from mit gondia maharastra sir i m not intrested in doing jobs and others i want some diffrent i have some my own business ideas and many more the problem is that i need a person who can help me so pls give some solution about it
email me at <removed>

Ai??

Posted: 21 Feb 2011 03:08 AM PST

ARTIFICIAL INTELLIGENCE


No No!!! This is not hypocrisy or show off of the knowledge. In the ever growing world with the increase in the technological development we have the concept of Artificial Intelligence catering to the needs of this insatiable world. Let us update our knowledge as we are in the computer era by knowing something about Artificial intelligence (AI).
AI is a field which studies and designs intelligent agents. Now, what are intelligent agents? These are the systems that perceive the environment and take decisions so as to maximize the chances of the objective to be achieved to the maximum possible extent. Precisely, it is the intelligence of the machines and computer science aims to create these type of systems. Now, having known about the system let us take a glance at the history. The term artificial intelligence was first framed by John McCarthy in 1956 at Dartmouth college. Artificial beings and thinking machines appear in Greek Myths dated long back. Stories of these beings seem to contain the same hopes, concerns and fears as presented by the AI.
McCarthy and his students wrote marvelous programmes which stunned the common man. These programes helped computer solve algebraic problems, prove logical theorems and speak English. By 1960, laboratories were established all over the world.

Things AI needs to do:

• Knowledge representation: system needs to have an extensive knowledge about the world so that it can function accordingly. It needs to represent objects, properties, categories, relation between objects, causes and effects etc. Facts should also be known.
• Planning: Must be capable of setting goals and in some way or the other visualize the future. It should be able to make choices to maximize the probability of completing a task.
• Machine Learning: sense of classification is necessary to sort a thing and tell to what it belongs. In some learning systems, the machine is punished for bad response and awarded for good one. This is done in computational learning theory.
• Language processing: it should be capable of reading and comprehending the language used by the humans.
• Social intelligence: must be capable of predicting actions of others by understanding their motives and emotional states. It must atleast appear polite and sensitive to the person with whom it interacts.


For instance we have two students from Teressa school of engineering who have designed a system TO LEARN TO PLAY CHESS USING AI.


:cool:

Digital FM Radio Receiver

Posted: 21 Feb 2011 02:50 AM PST

My thought of a Digital FM Receiver is like this:

1. There should be a microcontroller who will operate the entire job.
2. A key pad will be there for giving information to that microcontroller and for set frequency.
3. A digital display interface will be installed there to see the which frequency is set right now & also the name we assign to that frequency like RED FM-93.50.
4. Speakers to get stereo output.

Now what the problem is this FM Receiver is very low graded. But if we can operate the device through USB to a computer then things will be much easier, no extra key-pad to attach with, no display interface is needed we can use monitor instead of that display interface, and no speakers needed to get output we can use the speaker of the computer or laptop.
But I think the device to get accepted by the computer we need a driver software...
and I know this is not a easy task...

I have 2 problems those are:
1. I didn't yet figured out how to build a digital tuner.
2. And yes I don't know how to build a Driver software.

Is there any solution please tell me.
Thank you all.... :D

Green Cars #2: Mercedes SLS AMG eDRIVE

Posted: 21 Feb 2011 02:50 AM PST

In the last article, we discussed about the need and the development in the Green Car technology, that is, Electric Vehicle (EV) Technology and Audi e-TRON. In this article, we take the discussion further to another upcoming electric supercar by another German automobile giant, the Mercedes. Mercedes plans to launch its own complete electrically run [...]

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Cambridge Wireless to debate Privacy for LBS

Posted: 21 Feb 2011 02:34 AM PST

CAMBRIDGE, UK, 21st February 2011 – Cambridge Wireless announced today the latest presentation from the Location Based Systems / Service Special Interest Group in collaboration with CoDE, The Cultures of the Digital Economy (CoDE) Research Institute, Anglia Ruskin University. The event will be taking place on 23rd March and is kindly sponsored by CSR, Cambridge. For more information, please visit www.cambridgewireless.co.uk/events

This special Location SIG event explores the sensitive issue of privacy vs. personalised services. Most smart-phones have built in GPS and an increasing number of applications make use of the location capability of the phone, with this real and exciting development of new technology comes the time to debate the implications for personal privacy.

Nigel Wall, Shadow Creek Consulting and SIG Champion for this event commented, "The latest in the series of Location SIG events examines the privacy trade-off for users of social networks and advanced smart-phone applications where location information is shared. The risks and opportunities rise significantly when location information is shared. We shall consider the issues from various perceptions: users, suppliers and legislation. This current and sensitive topic will prove interesting and thought–provoking for many."

Key industry speakers will address the following issues relating to these advancements:
• Does use of location technology create real threats to personal privacy?
• Do users need to understand what information is collected and the way in which their movements could be tracked?
• Is there a healthy trade-off between loss of privacy and provision of personalised services (e.g. advice on services in the immediate vicinity)?
• Location determination by image recognition is becoming feasible – does this raise further issues, if individuals can be recognised?
• Does the industry need to pay more attention to protecting privacy?
• Best practices to adopt.

KanwarChadha, Chief Marketing Officer and Board Member of CSR says "This event will prove incredibly interesting as it addresses the issues of "Relevant Location" with the possibilities of protecting consumers whilst enhancing their service."

Confirmed speakers include; KanwarChadha, CSR, Dr Andrew Matthews, Nokia Research Centre, Patrick Clark, Taylor Wessing, Prof. Jonathan Raper, Placr and Dr. David Skinner, Anglia Ruskin University.

About Cambridge Wireless
Cambridge Wireless is a leading industry forum and vibrant community with a rapidly expanding network of companies actively involved in the development and application of wireless technologies. In addition to high level networking dinners, educational events and business development activities, Cambridge Wireless runs an annual Future of Wireless International Conference along with the Discovering Start-Ups initiative to support emerging, innovative wireless companies. Over 15 Special Interest Groups focused on specific technologies and market sectors, also provide opportunities for members to meet, form partnerships to exploit new commercial opportunities, and share knowledge and information about the latest industry trends and hot topics. Cambridge Wireless has partnerships with other leading industry clusters and organisations around the world to extend its international reach and to keep members up to date with the latest global developments and business opportunities. For more information, please visit www.cambridgewireless.co.uk

About CoDE, Anglia Ruskin University
The Cultures of the Digital Economy (CoDE) Research Institute is a multidisciplinary initiative at Anglia Ruskin University, Cambridge. CoDE is a network of academics working in media theory and network culture, media archaeology, digital music and video, fine arts, video games, production and performance, serious gaming and digital text, combined with scientific contributions from colleagues involved with design and technology, audio engineering and computer design and animation.
Its key emerging research areas include social media and network politics, digital performance and production, digital humanities and play and serious gaming. The Institute fosters a critical and experimental interdisciplinary research environment and through projects, seminars and published research aims to explore the role of current and emerging technologies in a creative context.
CoDE is crucible for thinking outside traditional disciplinary boundaries and a catalyst for establishing connections with industry and local, national and international communities. Its location in Cambridge provides it with excellent potential for collaboration with entertainment, technological, scientific, arts and the heritage industries. For more information, please visit: http://www.anglia.ac.uk/ruskin/en/home/microsites/code.html

About CSR
CSR plc is a leading provider of multifunction connectivity and location platforms. CSR's technology portfolio includes Bluetooth, GPS, FM, Wi-Fi (IEEE802.11), UWB, NFC and other technologies to enable silicon platforms that incorporate fully integrated radio, baseband and microcontroller elements. CSR's Connectivity Centre is designed to enhance the user experience with mainstream mobile devices by intelligent integration of multiple wireless connectivity and location-awareness technologies. CSR's Location Platforms are complemented by wireless connectivity and multimedia capabilities for high-volume mobile consumer devices and commercial applications.
CSR's technology has been adopted by market leaders into a wide range of mobile consumer devices such as mobile phones, automobile navigation and telematics systems, portable navigation devices (PNDs), wireless headsets, mobile computers, mobile internet devices, GPS recreational devices, digital cameras, mobile gaming, plus a wide range of personal and commercial tracking applications.

For Cambridge Wireless please contact:
Claire Hamence, Events and Marketing Coordinator,
Tel: +44 1223 422 365
Email: admin[at]cambridgewireless[dot]co.uk.
www.cambridgewireless.co.uk

Distributed on behalf of Cambridge Wireless by NeonDrum news distribution service (http://www.neondrum.com)

Ran out of Storage Space? Try Bacterial Hard Drives

Posted: 21 Feb 2011 01:50 AM PST

These days everyone has these huge collections of movies, music, documents and images which could hardly be stored in our regular computer hard disks. So, we are busy buying external hard disks with storage capacities starting from a few hundred gigabytes to around a Terabyte. There is no doubt that these hard disks have temporarily [...]

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Joule-Thomson Cooler - Temp/Mass flow rate

Posted: 20 Feb 2011 07:18 PM PST

Hello engineers
I need some help and advice! (I do my internship and I got this task to do. I need it soon, but I got stucked…)

I am creating some kind of Joule-Thomson cooler.
Conditions: I have pure Nitrogen in a closed tank under 6000 psi pressure and 190 deg C. When we open the valve the gas will flow in the pipe and cool down by Joule-Thomson effect.

I know that temperature change depends on the pressure drop.
So my question is: How can I calculate the Temperature change as a function of Flow Rate (pressure drop per second) for my conditions (6000psi, 190 degC)?!

I was searching it in some books and internet, but I could find any formula how to do it.
As far I understand, we need to find Joule-Thomson coefficient at 6000psi, 190degC right?

Thanks to everybody for any help in advance!
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