PowerUltrasonics newsletter

Dear subscriber;

The message above seems particularly true since the previous newsletter went out in June 2001! Since then I've been so tied up with trivia (earning a living, building a house, meeting my soul mate, getting married, in fact generally getting a life!) that the important job of maintaining this web site has been sadly neglected...

Seriously though, despite my neglect the site has continued to grow in popularity and many new people have signed up for the mailing list so I've decided to make an effort to improve it. Thank you for your patience and support!

~~~~~~~~~~~~~~~~ SUPPLIERS DATABASE UPDATED ~~~~~~~~~~~~~~~~~~

The first visible change is to the ultrasonics suppliers database, which is now implemented using a much more robust MySQL database for improved searching and easier updating. A new "simple search" looks for a keyword anywhere in the supplier information, and initial search results are now shown as a list of business names and descriptions with links to the full details.

Dear subscriber;

Welcome to the PowerUltrasonics newsletter for June 2001. Sorry for the long delay since the last one - there always seems to be something else that needs doing first... Anyway I hope you find something useful, and please feel free to forward a copy to anyone else you think would be interested.

~~~~~~~~~~~~~~~~~~~~~~ MPI WEB SITE ~~~~~~~~~~~~~~~~~~~~~~~~

The most recent distraction keeping me from writing newsletters was creating a new web site for Miodrag Prokic - see it at www.mpi-ultrasonics.com. Miodrag has 20 years experience in ultrasonic industrial engineering as a freelance technical expert and working for Branson, Krohne and Hamo, and he was able to supply some fascinating technical information for inclusion on the site - see the new articles section below. He's also keen to promote new applications of ultrasonics - here's a brief taster from the proposals page (more applications, and much more detail there):

Dear subscriber;

Welcome to the July PowerUltrasonics newsletter. I'm aiming to put out newsletters every six weeks or so or whenever I have some useful material! Please feel free to forward a copy to anyone else you think would be interested.

The main feature in this issue is an article kindly submitted by Linda McCausland of AEA Technology in the UK. If you would like to make your own contribution to a future issue, please e-mail it to me (chris@powerultrasonics.com). Provided it's relevant and contains something new and interesting (not just a sales pitch please!) I would be delighted to publish it.

~~~~~~~ AEA TECHNOLOGY SONOCRYSTALLIZER (TM) ~~~~~~~~~~~~

New Reactor to Improve Crystal Production in Pharmaceutical and Fine Chemical Industries

The AEA Technology Sonocrystallizer (TM) is a new reactor which helps the pharmaceutical, fine chemicals, and bio-technical products industries produce purer products through the production of better crystals. The Sonocrystallizer (TM) was developed and is now supplied by AEA Technology, the international science and engineering services business.

Dear subscriber;

Welcome to the June PowerUltrasonics newsletter. I'm aiming to put out newsletters every six weeks or so when there have been developments on the site to report. Please feel free to forward a copy to anyone else you think would be interested.

Not much news this time - I've been busy with a new site at www.cheers.au.com Nothing about ultrasonics there - it's offering web maps of Australia as a service to other web-sites - but please take a look if you have the time. It needs testing and I'd welcome any comments you can give me... Meanwhile, a question: Could magnetostrictive transducers be making a come-back??

~~~~~~~ GIANT MAGNETOSTRICTIVE MATERIALS ~~~~~~~~~~~~~~~

I'd like to start with a little history lesson if I may (experts can skip the next few paragraphs - I dont want to teach granny to suck eggs!)

Dear subscriber;

Welcome to the April PowerUltrasonics newsletter. I'm aiming to put out newsletters every six weeks or so when there have been developments on the site to report. Please feel free to forward a copy to anyone else you think would be interested.

~~~~~~~~~~~~~~~~~~ NEW ARTICLES ~~~~~~~~~~~~~~~~~~~

New on the articles page since last issue:

Numerical calculation of pressure fields in sonochemical reactors, by Sascha Dähnke and Frerich J. Keil.

A mathematical analysis aimed at calculating theoretically the oscillating pressure fields in various sonochemical reactors. The results (so far based on linear analysis only) include pressure maps for several different designs, one of which is available as an animation. Did you think the amplitude in your sonochemistry reaction vessel was uniform?!

Theory of ultrasonic metal welding from American Technology (AmTech) Inc.

Dear subscriber;

Welcome to the first PowerUltrasonics newsletter. This occasional publication is designed to keep you up to date with developments on the site. Please feel free to forward a copy to anyone else you think would be interested.

~~~~~~~~~~~~~~~~ POWER ULTRASONICS ~~~~~~~~~~~~~~~~

The PowerUltrasonics web-site (www.powerultrasonics.com) provides an independent information resource in this field which is surprisingly lacking in books and academic research. Some of the best information comes from the equipment manufacturers, but they are naturally reluctant to provide links
to other information sources on their competitors' sites!

The most popular features are:

• Introduction to power ultrasonics (www.powerultrasonics.com/intro.html) - gives newcomers a basic understanding of the underlying physics and the practical applications.
• Articles about power ultrasonics (www.powerultrasonics.com/articles.html) - links to technical information on the web. I am always looking for more of these so if you know of any please
  let me know.